# How do I get the differential of Hermite polynomial function?

3 views (last 30 days)
mohammed omran on 6 Oct 2020
Edited: Anirban on 8 Oct 2020
syms m1 x
diff(hermiteH(m1, x),x)
Anirban on 8 Oct 2020
Edited: Anirban on 8 Oct 2020
Hi,
This might be unrelated to your original question, but the paths you show seem a little strange. You show a Polyspace path but you are using the Symbolic Math Toolbox which is unrelated to Polyspace.
The paths show:
C:\Program Files\Polyspace\R2020a\toolbox\symbolic\symbolic\@double\hermiteH.m
Whereas it should be:
C:\Program Files\MATLAB\R2020a\toolbox\symbolic\symbolic\@double\hermiteH.m
Did you by any chance do an addpath(genpath('C:\Program Files\Polyspace')) to your MATLAB installation to integrate Polyspace and MATLAB? If so, please use restoredefaultpath to restore the default MATLAB path (or at least use rmpath to remove paths starting with C:\Program Files\Polyspace) and then use the official instructions to integrate Polyspace and MATLAB.

madhan ravi on 6 Oct 2020
Edited: madhan ravi on 6 Oct 2020
https://www.mathworks.com/matlabcentral/answers/606286-how-do-i-get-the-differential-of-hermite-polynomial-function#comment_1039721 , you have to run the code in MATLAB by pressing enter in command window or by pressing the green triangle button in script or shift + ctrl/cmd.

Star Strider on 6 Oct 2020
Did you run the code you posted?
When I run it (in R2020b):
syms m1 x
DHx = diff(hermiteH(m1, x),x)
I get:
DHx =
2*m1*hermiteH(m1 - 1, x)
.
Star Strider on 7 Oct 2020
My pleasure!
In the interim, you can use the result I posted.

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