[分享]Matlab指令集
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<P align=center><B>Command</B><B>
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<P align=center><B>Description</B><B>
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<P>abs
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<P>Absolute value
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<P>acker
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<P>Compute the K matrix to place the poles of A-BK, see also place
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<p></TD></TR>
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<P>axis
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<P>Set the scale of the current plot, see also plot, figure
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<P>bode
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<p></TD>
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<P>Draw the Bode plot, see also logspace, margin, nyquist1
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<P>c2dm
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<P>Continuous system to discrete system
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<P>clf
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<P>Clear figure (use clg in Matlab 3.5)
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<P>conv
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<P>Convolution (useful for multiplying polynomials), see also deconv
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<P>ctrb
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<P>The controllability matrix, see also obsv
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<P>deconv
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<P>Deconvolution and polynomial division, see also conv
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<P>det
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<P>Find the determinant of a matrix
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<P>dimpulse
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<P>Impulse response of discrete-time linear systems, see also dstep
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<P>dlqr
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<P>Linear-quadratic requlator design for discrete-time systems, see also lqr
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<P>dlsim
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<P>Simulation of discrete-time linear systems, see also lsim
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<P>dstep
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<P>Step response of discrete-time linear systems, see also stairs
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<P>eig
<p>
<p></TD>
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<P>Compute the eigenvalues of a matrix
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<p></TD></TR>
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<P>eps
<p>
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<P>Matlab's numerical tolerance
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<p></TD></TR>
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<P>feedback
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<P>Feedback connection of two systems.
<p>
<p></TD></TR>
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<P>figure
<p>
<p></TD>
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<P>Create a new figure or redefine the current figure, see also subplot, axis
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<P>for
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<P>For, next loop
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<P>format
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<P>Number format (significant digits, exponents)
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<P>function
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<P>Creates function m-files
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<P>grid
<p>
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<P>Draw the grid lines on the current plot
<p>
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<P>gtext
<p>
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<P>Add a piece of text to the current plot, see also text
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<P>help
<p>
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<P>HELP!
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<P>hold
<p>
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<P>Hold the current graph, see also figure
<p>
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<P>if
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<P>Conditionally execute statements
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<P>imag
<p>
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<P>Returns the imaginary part of a complex number, see also real
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<P>impulse
<p>
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<P>Impulse response of continuous-time linear systems, see also step, lsim, dlsim
<p>
<p></TD></TR>
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<P>input
<p>
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<P>Prompt for user input
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<P>inv
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<P>Find the inverse of a matrix
<p>
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<P><a href="http://www.engin.umich.edu/group/ctm/extras/jgrid.html" target="_blank" >jgrid</A>
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<P>Generate grid lines of constant damping ratio (zeta) and settling time (sigma), see also sgrid, sigrid, zgrid
<p>
<p></TD></TR>
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<P>legend
<p>
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<P>Graph legend
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<P>length
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<P>Length of a vector, see also size
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<P>linspace
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<P>Returns a linearly spaced vector
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<P><a href="http://www.engin.umich.edu/group/ctm/extras/lnyquist1.html" target="_blank" >lnyquist1</A>
<p>
<p></TD>
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<P>Produce a Nyquist plot on a logarithmic scale, see also nyquist1
<p>
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<P>log
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<P>natural logarithm, also log10: common logarithm
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<P>loglog
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<P>Plot using log-log scale, also semilogx/semilogy
<p>
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<P>logspace
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<P>Returns a logarithmically spaced vector
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<P>lqr
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<P>Linear quadratic regulator design for continuous systems, see also dlqr
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<P><a href="http://www.engin.umich.edu/group/ctm/extras/lsim.html" target="_blank" >lsim </A>
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<P>Simulate a linear system, see also step, impulse, dlsim.
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<P>margin
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<P>Returns the gain margin, phase margin, and crossover frequencies, see also bode
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<P>norm
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<P>Norm of a vector
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<P><a href="http://www.engin.umich.edu/group/ctm/extras/nyquist1.html" target="_blank" >nyquist1</A>
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<P>Draw the Nyquist plot, see also lnyquist1. Note this command was written to replace the Matlab standard command nyquist to get more accurate Nyquist plots.
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<p></TD></TR>
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<P>obsv
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<P>The observability matrix, see also ctrb
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<P>ones
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<P>Returns a vector or matrix of ones, see also zeros
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<P>place
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<P>Compute the K matrix to place the poles of A-BK, see also acker
<p>
<p></TD></TR>
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<P><a href="http://www.engin.umich.edu/group/ctm/extras/plot.html" target="_blank" >plot </A>
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<P>Draw a plot, see also figure, axis, subplot.
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<P>poly
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<P>Returns the characteristic polynomial
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<P><a href="http://www.engin.umich.edu/group/ctm/extras/polyadd.html" target="_blank" >polyadd</A>
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<P>Add two different polynomials
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<P>polyval
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<P>Polynomial evaluation
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<P>print
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<P>Print the current plot (to a printer or postscript file)
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<P>pzmap
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<P>Pole-zero map of linear systems
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<P>rank
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<P>Find the number of linearly independent rows or columns of a matrix
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<P>real
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<P>Returns the real part of a complex number, see also imag
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<P>rlocfind
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<P>Find the value of k and the poles at the selected point
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<P>rlocus
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<P>Draw the root locus
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<P>roots
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<P>Find the roots of a polynomial
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<P><a href="http://www.engin.umich.edu/group/ctm/extras/rscale.html" target="_blank" >rscale</A>
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<P>Find the scale factor for a full-state feedback system
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<P>set
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<P>Set(gca,'Xtick',xticks,'Ytick',yticks) to control the number and spacing of tick marks on the axes
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[此贴子已经被VibInfo于2006-4-4 0:13:04编辑过]
回复：（chenyh_nju）Matlab指令集
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<P ><FONT face="Times New Roman">series <p></p></FONT></P></TD>
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<P ><FONT face="Times New Roman">Series interconnection of Linear time-independent systems<p></p></FONT></P></TD></TR>
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<P ><FONT face="Times New Roman">sgrid<p></p></FONT></P></TD>
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<P ><FONT face="Times New Roman">Generate grid lines of constant damping ratio (zeta) and natural frequency (Wn), see also jgrid, sigrid, zgrid<p></p></FONT></P></TD></TR>
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<P ><a href="http://www.engin.umich.edu/group/ctm/extras/sigrid.html" target="_blank" ><FONT face="Times New Roman">sigrid</FONT></A><FONT face="Times New Roman"> </FONT><p></p></P></TD>
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<P ><FONT face="Times New Roman">Generate grid lines of constant settling time (sigma), see also jgrid, sgrid, zgrid <p></p></FONT></P></TD></TR>
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<P ><FONT face="Times New Roman">size <p></p></FONT></P></TD>
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<P ><FONT face="Times New Roman">Gives the dimension of a vector or matrix, see also length<p></p></FONT></P></TD></TR>
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<P ><FONT face="Times New Roman">sqrt <p></p></FONT></P></TD>
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<P ><FONT face="Times New Roman">Square root<p></p></FONT></P></TD></TR>
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<P ><FONT face="Times New Roman">ss<p></p></FONT></P></TD>
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<P ><FONT face="Times New Roman">Create state-space models or convert LTI model to state space, see also tf<p></p></FONT></P></TD></TR>
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<P ><FONT face="Times New Roman">ss2tf<p></p></FONT></P></TD>
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<P ><FONT face="Times New Roman">State-space to transfer function representation, see also tf2ss<p></p></FONT></P></TD></TR>
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<P ><FONT face="Times New Roman">ss2zp<p></p></FONT></P></TD>
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<P ><FONT face="Times New Roman">State-space to pole-zero representation, see also zp2ss<p></p></FONT></P></TD></TR>
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<P ><FONT face="Times New Roman">stairs<p></p></FONT></P></TD>
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<P ><FONT face="Times New Roman">Stairstep plot for discreste response, see also dstep<p></p></FONT></P></TD></TR>
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<P ><a href="http://www.engin.umich.edu/group/ctm/extras/step.html" target="_blank" ><FONT face="Times New Roman">step </FONT></A><p></p></P></TD>
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<P ><FONT face="Times New Roman">Plot the step response, see also impulse, lsim, dlsim.<p></p></FONT></P></TD></TR>
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<P ><FONT face="Times New Roman">subplot <p></p></FONT></P></TD>
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<P ><FONT face="Times New Roman">Divide the plot window up into pieces, see also plot, figure<p></p></FONT></P></TD></TR>
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<P ><FONT face="Times New Roman">text <p></p></FONT></P></TD>
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<P ><FONT face="Times New Roman">Add a piece of text to the current plot, see also title, xlabel, ylabel, gtext<p></p></FONT></P></TD></TR>
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<P ><FONT face="Times New Roman">tf<p></p></FONT></P></TD>
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<P ><FONT face="Times New Roman">Creation of transfer functions or conversion to transfer function, see also ss<p></p></FONT></P></TD></TR>
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<P ><FONT face="Times New Roman">tf2ss<p></p></FONT></P></TD>
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<P ><FONT face="Times New Roman">Transfer function to state-space representation, see also ss2tf<p></p></FONT></P></TD></TR>
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<P ><FONT face="Times New Roman">tf2zp<p></p></FONT></P></TD>
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<P ><FONT face="Times New Roman">Transfer function to Pole-zero representation, see also zp2tf<p></p></FONT></P></TD></TR>
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<P ><FONT face="Times New Roman">title <p></p></FONT></P></TD>
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<P ><FONT face="Times New Roman">Add a title to the current plot<p></p></FONT></P></TD></TR>
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<P ><a href="http://www.engin.umich.edu/group/ctm/extras/wbw.html" target="_blank" ><FONT face="Times New Roman">wbw</FONT></A><FONT face="Times New Roman"> </FONT><p></p></P></TD>
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<P ><FONT face="Times New Roman">Returns the bandwidth frequency given the damping ratio and the rise or settling time.<p></p></FONT></P></TD></TR>
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<P ><FONT face="Times New Roman">xlabel/ylabel <p></p></FONT></P></TD>
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<P ><FONT face="Times New Roman">Add a label to the horizontal/vertical axis of the current plot, see also title, text, gtext<p></p></FONT></P></TD></TR>
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<P ><FONT face="Times New Roman">zeros <p></p></FONT></P></TD>
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<P ><FONT face="Times New Roman">Returns a vector or matrix of zeros<p></p></FONT></P></TD></TR>
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<P ><FONT face="Times New Roman">zgrid<p></p></FONT></P></TD>
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<P ><FONT face="Times New Roman">Generates grid lines of constant damping ratio (zeta) and natural frequency (Wn), see also sgrid, jgrid, sigrid <p></p></FONT></P></TD></TR>
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<TD >
<P ><FONT face="Times New Roman">zp2ss<p></p></FONT></P></TD>
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<P ><FONT face="Times New Roman">Pole-zero to state-space representation, see also ss2zp<p></p></FONT></P></TD></TR>
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<P ><FONT face="Times New Roman">zp2tf<p></p></FONT></P></TD>
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<P ><FONT face="Times New Roman">Pole-zero to transfer function representation, see also tf2zp</FONT><p></p></P></TD></TR></TABLE></DIV>
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