Internal Matlab function not found (isnan)

From the command window (but also in scripts) I get the following.

K>> ans = isnan(bSteadyX);

'isnan' is not found in the current folder or on the MATLAB path, but exists in:

/Applications/MATLAB_R2022a.app/toolbox/matlab/elmat

Change the MATLAB current folder or add its folder to the MATLAB path.

K>> addpath '/Applications/MATLAB_R2022a.app/toolbox/matlab/elmat'

K>> ans = isnan(bSteadyX);

'isnan' is not found in the current folder or on the MATLAB path, but exists in:

/Applications/MATLAB_R2022a.app/toolbox/matlab/elmat

Change the MATLAB current folder or add its folder to the MATLAB path.

K>> cd '/Applications/MATLAB_R2022a.app/toolbox/matlab/elmat'

K>> ans = isnan(bSteadyX);

Unrecognized function or variable 'isnan'.

But if run the live script provided in the help documents ...

Replace NaN Elements

Create an array and find the elements with NaN values.

A = [1,3,5,7,NaN,10,NaN,4,6,8]

A = 1×10

1 3 5 7 NaN 10 NaN 4 6 8

TF = isnan(A)

TF = 1×10 logical array

0 0 0 0 1 0 1 0 0 0

So isnan works just fine from a live script but not from the command window.

Answer 1

[Star Strider]

Try —

rehash toolboxcache

.

Answer 2

[Jan]

Try:

restoredefaultpath

[Mark Anderson]

No Joy ...

K>> ans = isnan(bSteadyX);

'isnan' is not found in the current folder or on the MATLAB path, but exists in:

/Applications/MATLAB_R2022a.app/toolbox/matlab/elmat

Change the MATLAB current folder or add its folder to the MATLAB path.

K>> restoredefaultpath

K>> ans = isnan(bSteadyX);

'isnan' is not found in the current folder or on the MATLAB path, but exists in:

/Applications/MATLAB_R2022a.app/toolbox/matlab/elmat

Change the MATLAB current folder or add its folder to the MATLAB path.

K>> cd '/Applications/MATLAB_R2022a.app/toolbox/matlab/elmat'

K>> ans = isnan(bSteadyX);

Unrecognized function or variable 'isnan'.