Binary string to character conversion

How can i assign 00 to -3d, 01 to -d, 11 to +d, 10 to +3d if i have a binary string x = char('0' + (rand(1, 1000) < 0.5))?

Answer 1

[Azzi Abdelmalek]

x = char('0' + (rand(1, 1000) < 0.5))
a={'-3d' '-d' '+d' '+3d'}
idx=bin2dec(reshape(x,2,[])')+1
out=a(idx)

If you want to join them

out=strjoin(a(idx),'')

[Ying Wai Wong]

I am new to Matlab. What is idx mean? There is idx = 231412344.....etc

[Azzi Abdelmalek]

There is an error;

 a={'-3d' '-d' '+3d' '+d'}

You have

00 corresponds to index idx=1
01 corresponds to index idx=2
10 corresponds to index idx=3
11 corresponds to index idx=4

[Ying Wai Wong]

ahh yes, cheers mate! and if i want to change d to 1 how can i do it?

[Azzi Abdelmalek]

strrep(out,'d','1')