what is the best mode to populate this array in this loop annidate?

i want to code it to creare text for legend plot! (legend)

it's better to use string and strcat or use arraycell ?

if the better is the second how can i do it?

or is it better to create the text outside the nested loop?

str1="a";
wA=1;


str2="b";
wB=1;

n=5;
b=2;

valA=rand(n,1,1) %it's only for example..i don't use it :)

valA = 5×1

0.4488 0.3232 0.4840 0.9989 0.2870

valB=rand(b,1,1)

valB = 2×1

0.3478 0.2064

clear str
count=0;
strtot="";
for i=1:n
    for k=1:b
         count=count+1;
         if wA==1
            strtot=strcat(str1,"-",num2str(valA(i)))
         end 
         if wB==1
            strtot=strcat(strtot," ** ",str2,"-",num2str(valB(k)))
         end 
         strArr(count,:)=strtot;
     end     
end 

strtot = "a-0.44885"

strtot = "a-0.44885 ** b-0.34784"

strtot = "a-0.44885"

strtot = "a-0.44885 ** b-0.20644"

strtot = "a-0.32321"

strtot = "a-0.32321 ** b-0.34784"

strtot = "a-0.32321"

strtot = "a-0.32321 ** b-0.20644"

strtot = "a-0.48396"

strtot = "a-0.48396 ** b-0.34784"

strtot = "a-0.48396"

strtot = "a-0.48396 ** b-0.20644"

strtot = "a-0.99888"

strtot = "a-0.99888 ** b-0.34784"

strtot = "a-0.99888"

strtot = "a-0.99888 ** b-0.20644"

strtot = "a-0.28696"

strtot = "a-0.28696 ** b-0.34784"

strtot = "a-0.28696"

strtot = "a-0.28696 ** b-0.20644"

Answer 1

[Dyuman Joshi]

It would be better to use string instead of cells as they take less memory and easier to work with -

n=5;
b=2;

valA=rand(n,1,1) %it's only for example..i don't use it :)

valA = 5×1

0.1930 0.5700 0.8833 0.6422 0.7329

valB=rand(b,1,1)

valB = 2×1

0.6020 0.5495

[A,B] = meshgrid(valA,valB);

"a-" + string(A(:)) + " ** b-" + string(B(:))

ans = 10×1 string array
    "a-0.19302 ** b-0.60203"
    "a-0.19302 ** b-0.54955"
    "a-0.56996 ** b-0.60203"
    "a-0.56996 ** b-0.54955"
    "a-0.88331 ** b-0.60203"
    "a-0.88331 ** b-0.54955"
    "a-0.64219 ** b-0.60203"
    "a-0.64219 ** b-0.54955"
    "a-0.73285 ** b-0.60203"
    "a-0.73285 ** b-0.54955"

[pipor]

thank for your code but my code is different

i use wA==0 o wA==1

and wB==0 or wB==1

this value are definite in the my loop code (you don't see it in this code because is a semplification

[Dyuman Joshi]

I am well aware that your code is different and that you have used wA and wB in your code inside the for loop, but I was giving a general example.

You can always modify the code according to requirement.

Let's consider that the input are -

A = [2 3 5 7];
B = [1 4 6 8];

What should be the output if

1 - wA is zero and wB is one?

2 - wA is one and wB is zero?

3 - wA is one and wB is one?

[pipor]

yes...it can be like your example but I solved it as a post I wrote.. Thanks anyway for the help