Can I save different variables inside of a for loop?

Hello everyone.

I am working with a code in which 50 variables have to be saved. Each of them is a row of a matrix. I am trying to implement this as

for i=1:50
    element_of_the_ensemble=i;%de 1 a 50
    windX_in_the_node=vientoX_vector(:,element_of_the_ensemble);
    windY_in_the_node=vientoY_vector(:,element_of_the_ensemble);

    matriz_a_enviarX_1_of_50=zeros(size(windX_in_the_node,1), 3);
    matriz_a_enviarX_1_of_50(:,1:2)=positions_reducida;
    matriz_a_enviarY_1_of_50=zeros(size(windY_in_the_node,1), 3);
    matriz_a_enviarY_1_of_50(:,1:2)=positions_reducida;
    matriz_a_enviarX_1_of_50(:,3)=windX_in_the_node;
    matriz_a_enviarY_1_of_50(:,3)=windY_in_the_node;
    save('Xdata_'+i+'_of_50', 'matriz_a_enviarX_1_of_50')
    save('Ydata_'+i+'_of_50', 'matriz_a_enviarY_1_of_50')
end

I have based this attempt in this other question. Unfortunately, I obtain an error.

Error using save
Must be a text scalar.

Error in read_data (line 619)
    save('Xdata_'+i+'_of_50', 'matriz_a_enviarX_1_of_50')

So, it seems that my idea doesn't work.

Can someone please tell me if I can really automate this process?

Best regards.

Jaime.

Answer 1

[Scott MacKenzie]

Create the desired name of the file as a string or character variable, then use that variable with the save command. For example,

filename = sprintf('Xdata_%d_of_50', i);
save(filename, 'matriz_a_enviarX_1_of_50')

[Jaime De La Mota Sanchis]

Thank you very much. This does it perfectly

Answer 2

[Andreas Mittnacht]

Hi Jaime,

1. for better performance do calculation without a loop
2. to save data, use

save('Xdata_%d_of_50', i 'matriz_a_enviarX_1_of_50')

[Jaime De La Mota Sanchis]

Thanks for the answer. However, if I implement it I obtain the following error:

Error using save
Must be a text scalar.

Error in read_data (line 619)
    save('Xdata_%d_of_50', i, 'matriz_a_enviarX_1_of_50')

I have tested if I need another comma after the i, but the error persists.