I would like to compile a text string for each one of the three index of two given arrays

Hi,

Given two array XX=[1,2,3] YY=[3,2,1]

and a typical string:

&DEVC ID='vel_XX', QUANTITY='VELOCITY', ABC=YY,0.0525,9.74/

where the bold letters represent the given array. I would like to write a string for each one of the three index of the arrays:

&DEVC ID='vel_1', QUANTITY='VELOCITY', ABC=3,0.0525,9.74/

&DEVC ID='vel_2', QUANTITY='VELOCITY', ABC=2,0.0525,9.74/

&DEVC ID='vel_3', QUANTITY='VELOCITY', ABC=1,0.0525,9.74/

Can You Help me?

Answer 1

[Stephen23]

Simpler with compose:

XX = [1,2,3,4.96875];
YY = [3,2,1,0];
fmt = "&DEVC ID=''vel_%g'', QUANTITY=''VELOCITY'', ABC=%d,0.0525,9.74/";
out = compose(fmt,XX(:),YY(:))

out = 4×1 string array
    "&DEVC ID=''vel_1'', QUANTITY=''VELOCITY'', ABC=3,0.0525,9.74/"
    "&DEVC ID=''vel_2'', QUANTITY=''VELOCITY'', ABC=2,0.0525,9.74/"
    "&DEVC ID=''vel_3'', QUANTITY=''VELOCITY'', ABC=1,0.0525,9.74/"
    "&DEVC ID=''vel_4.96875'', QUANTITY=''VELOCITY'', ABC=0,0.0525,9.74/"

Answer 2

[Rik]

Easy with sprintf:

XX=[1,2,3];
YY=[3,2,1];
z=repmat("",size(XX));
FormatSpec='&DEVC ID=''vel_%d'', QUANTITY=''VELOCITY'', ABC=%d,0.0525,9.74/';
for n=1:numel(XX)
    z(n)=string(sprintf(FormatSpec,XX(n),YY(n)));
end
disp(z.')

    "&DEVC ID='vel_1', QUANTITY='VELOCITY', ABC=3,0.0525,9.74/"
    "&DEVC ID='vel_2', QUANTITY='VELOCITY', ABC=2,0.0525,9.74/"
    "&DEVC ID='vel_3', QUANTITY='VELOCITY', ABC=1,0.0525,9.74/"

[SYML2nd]

Thank you, I used your code. The only problem is that I don't want the scientific format of the numbers like that:

"&DEVC ID='Y_u_vel_-4.968750e+00', QUANTITY='U-VELOCITY', XYZ=4.99,2.125000e-02,9.74/"

I would like to have:

"&DEVC ID='Y_u_vel_-4.96875', QUANTITY='U-VELOCITY', XYZ=4.99,0.2125,9.74/"

How can I obtain that?

[Rik]

For completeness' sake: you should read the documentation for sprintf (or fprintf), which will show you the full list of options, including the %g flag that Stephen used in his answer.