Very simple mathworks own example code from website will not run

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Robert
Robert 2016-10-2
评论： Walter Roberson 2016-10-8
Matlab has posted this example code found here
https://www.mathworks.com/help/control/ref/pzmap.html
and yet it won't run
anyone has any ideas?????????
this is grossly frustrating when mat labs very own examples will not run on their own software.
H = tf([2 5 1],[1 3 5]);
pzmap(H)
grid on
Error as follows
Error using DynamicSystem/pzmap
Plots must be of the same type and size to be superimposed.
Error in PoleZeroPlotOfDynamicSystemExample (line 8)
pzmap(H)
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Walter Roberson
Walter Roberson 2016-10-7
Data point: the reported problem does not happen to me in Windows 10 in R2015a or R2016b.
Walter Roberson
Walter Roberson 2016-10-8
Data point: the reported problem does not happen to me in Windows 10 in R2015b.
Please be specific about which operating system you are using, and please double-check which MATLAB release it is failing in for you and verify that it is still failing for you.
Please also experiment with
restoredefaultpath
in case one of your own .m files is interfering.

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回答（1 个）

Brandon Eidson
Brandon Eidson 2016-10-7
Hello Robert,
I have tested the example you listed on releases as far back as R2008a. All have run without an error.
I have seen a similar error before that was fixed by completely uninstalling and reinstalling MATLAB. I recommend trying the same.
Short of that, you might simply try resetting MATLAB preferences by using the following steps.
  1. Find your preferences directory by typing "prefdir" in the MATLAB Command Window.
  2. Exit MATLAB and delete the directory found under point 1.
  3. Start MATLAB again.
If that doesn't work, go with the complete uninstall/reinstall approach.

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