Convert a value into a Matlab syntax string

Hi all,

is it possible to convert a value from an struct into a string using the Matlab syntax ?

e.g.

I folowing struct : exStruct.value = [1 0 0;0 1 0;0 0 1];

If i am using num2str(exStruct.value) the output is a char that looks like this:

val =

1 0 0

0 1 0

0 0 1

What i want is more sth. like this :

val =

[1 0 0;0 1 0;0 0 1]

Is this possible ?

Cheers

Answer 1

[Ameer Hamza]

You can do something like this

exStruct.value = [1 0 0;0 1 0;0 0 1];
out = ['[' strjoin(compose(repmat(' %d ',1,3), exStruct.value), ';') ']']

Result

>> out
out =
    '[ 1  0  0 ; 0  1  0 ; 0  0  1 ]'

Answer 2

[Rik]

You can do it like that, but it is already Matlab syntax if you add the square brackets, as arrays can be defined across multiple lines.

Anyway: you can split the resulting char into rows (e.g. with mat2cell), add semicolons between each (e.g. with sprintf('%s;', c{:}) removing the trailing semicolon), and add the brackets to either side.

If you have trouble implementing this, post a comment with the code you tried.

Answer 3

[Steven Lord]

mat2str([1 0 0;0 1 0;0 0 1])

ans = '[1 0 0;0 1 0;0 0 1]'

But if you're doing this so you can later on evaluate this text to define the variable, I would advise against it. The general consensus is to avoid eval wherever possible.