Boxcar wont recognize a double

Hello,

I am working on an assignment and we were provided with some sample code to use for part of a problem. When I input the code, I get the following error

Undefined function 'boxcar' for input arguments of type 'double'.

for this bit of code

Fs=1/dt; % sampling frequency (need to define T)
nfft = 1024; % number of points to use
noverlap = nfft/2; % number of points to overlap
window = boxcar(nfft); % don’t smooth ends
leny = length(time2); % length of time history
v = x2(leny-nfft+1:leny,2); % use last samples of vel(steady state)
[Pxx,F] = pwelch(v,window,noverlap,[],Fs); % compute PSD

I have read the description for pwelch and somewhat understand how its being used, but Im not quite sure why boxcar is returning an error.

[Sravan Pentlavelly]

Hi,

Can you confirm the following details

1. Is signal processing toolbox already installed in your machine ?

You can check this by typing ‘ver’ in MATLAB command window

2. Do you have any other user defined function named ‘boxcar’ in your MATLAB path?

You can verify this by typing ‘which boxcar.m’ in the MATLAB command prompt . Ideally you should

have boxcar.m file in following location in case of windows.

C:\Program Files\MATLAB\<MATLABVERSION>\toolbox\signal\signal\boxcar.m

[Braden Kerr]

This was it, I guess when I updated to 2020b I lost a lot of the apps I thought I had. Thank you