How to transform a vector that have "*" to indicate that a number is repeated

hello,

I have a relative simple question... I have a vector A=[3*2 1 5*10] and I would like that this vector will be transformed in a column vector B=[2 2 2 1 10 10 10 10 10]'... How to do it in an efficient manner? By the way, the first number in A is the frequency of the following number is repeated...

Regards,

[Fangjun Jiang]

see repmat(), repelem(), as long as you can provide A in a recognizable format

[Walter Roberson]

is it a text vector? Because if you entered that into matlab you would not be able to distinguish between needing 3 3 or needing 2 2 2 or needing 1 1 1 1 1 1

Answer 1

[Mathieu NOE]

hello

my suggestion :

A='3*2 1 5*10';

As = split(A);
out_all = [];

for ci = 1:numel(As)
    B = split(As{ci},'*');
    BB = str2double(B);
    if numel(B)>1 % then we have a multiplier
        out = repmat(BB(2),1,BB(1));
    else
        out = BB;
    end
    out_all = [out_all out];
end

[Yuyohow]

Thanks for yout help!

[Mathieu NOE]

My pleasure !

Answer 2

[Matt J]

A='3*2 1*1 5*10';

C=str2double(strsplit(A,{' ','*'}));

B=repelem(C(2:2:end), C(1:2:end))

B = 1×9

2 2 2 1 10 10 10 10 10