zpk function is missing
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I am using MATLAB R2020b, and Signal processing toolbox Ver. 8.5. The "zpk" function does not work. I have already tried following recommendation but no success:
restoredefaultpath
rehash toolboxcache
Please help me.
1 Kommentar
Fangjun Jiang
am 31 Mär. 2021
There is no zpk() function in Signal Processing Toolbox Ver 8.5. What is the error of zpk() in R2020b if you have the Control System Toolbox?
Antworten (3)
Fangjun Jiang
am 29 Mär. 2021
I believe zpk() requires Control System Toolbox. Check to see if you have it
ver control
2 Kommentare
Star Strider
am 29 Mär. 2021
In the Signal Processing Toolbox, the [z,p,k] output is optional for several filter design functions. Use those with (for example) zp2sos or others to design the filter to be used with filtfilt to filter a signal.
Ahmed Redissi
am 14 Apr. 2021
Hi,
While there is no "zpk" function in the Signal Processing Toolbox, there is a method called "zpk" of the object "digitalFilter". If you have the Signal Processing Toolbox, you can call the "zpk" function if the input is a digitalFilter object. Here's an example:
hpFilt = designfilt('highpassiir','FilterOrder',8, ...
'PassbandFrequency',75e3,'PassbandRipple',0.2, ...
'SampleRate',200e3);
[z,p,k] = zpk(hpFilt);
You can learn more about it here:
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