How to access workspace variables one by one using m-script

Hello,

I would like to read all workspace variables into array and check whether the name of variable is Matlab keyword or not. For example, I have four variables in workspace(a = 1;b=2;c=3;d=4;). I want to check if the varaible is keyword or not using matlab inbuilt function(iskeyword()) like below.

iskeyword('a')

ans =

       0

>> iskeyword('if')

ans =

       1

Is it possible check all base work space variables like this?

Answer 1

[Nobel Mondal]

You can get all the workspace variables like this:

>> varList = evalin('base', 'who');

Then check individual parameters:

>> iskeyword(varList{k})  % for k-th parameter

[gvreddy]

Hello Nobel,

I tried your code syntax also:

a = 1;
b=2;
c=3;
d=4;
y = 'if';
varList = evalin('base','who');
for k=1 : length(varList)
    result_1 = iskeyword(varList{k})  % for k-th parameter
end

when I run this code, I am getting empty varList. Is that correct ?

[Nobel Mondal]

Ah, you're probably calling this from inside a function. You need to define the WorkSpace context: 'base' or 'caller'

Or else, you simply can try

>> varList = who;

If the scope isn't changing.

[gvreddy]

Hello Nobel,

after small change for your syntax.I got what I need.

allBaseWorkspaceVar = evalin('base','whos');

Answer 2

[Azzi Abdelmalek]

a = 1;
b=2;
c=3;
d=4;
s1=whos
out=cellfun(@iskeyword,{s1.name})

[gvreddy]

Hello Azzi,

thanks for reply..I tried your code:

a = 1;
b=2;
c=3;
d=4;
y = 'if';
s1=whos;
out=cellfun(@iskeyword,{s1.name})
output :

out =

     0     0     0     0     0

It should returns last element '1'. could you please let me know why its not giving expected result?

[Azzi Abdelmalek]

in your example, the name of your variable is 'y', not 'if'

[gvreddy]

but when I type command "iskeyword(y)" , Matlab returns value '1'

what is that mean?

[Azzi Abdelmalek]

Maybe you need this

s1=whos
s2={s1.name}
for k=1:numel(s1)
  out(k)=iskeyword(eval(s2{k}))
end