save data from function to ws

Hello,

I want to save the data of a 8x1 matrix to the workspace from a function. However, the variables in the matrix change every time the function is called, while the name of the Matrix stays the same.

I tried assignin. This works well but now I want to create a matrix consisting of a row of 8x1 variables. I actually want the following;

assignin('base','Pars2(end+1,:)',Pars)

But this doesnt work.

Can anybody help me? Thanks in advance!

Greetings Boudewijn

Answer 1

[Iain]

You have three options.

 1. Use evalin or assignin correctly to put the variable into the base workspace. 
 2. Change your function to a script, and just directly work in the calling workspace. 
 3. Return everything you want your function to return, as an argument.

e.g.

 function [cosine_result, sine_result, tangent_result] = trigfcns(angles)
 cosine_result = cos(angles);
 sine_result = sin(angles);
 tangent_result = cosine_result ./ sine_result;

Then call your function like:

 [cosses, sines, tans] = trigfcns([45 31 91 64]*pi/180);

From a programming quality/best practice point of view, the advice would be to just use the 3rd option. - Using varargout & nargout as ways of not returning optional output.

[Bou]

thanks for the help!

I finally created a global variable and did the following

global Pars2;
Pars2(end+1,1:length(Pars)) = Pars;

that did the job:)

Answer 2

[Dishant Arora]

As the documentation suggests, 2nd parameter has to be only the variable name, it cannot have any indices. Better assign that value to a new variable in workspace and later on add it to existing matrix.

assign('base' , 'newVar', val);
existingMat(end+1,:)=newVar;