Is there way to easily change the value of multiple values using a for loop?

This is hard for me to explain, but I was wondering if there was a way to use a for loop to simlify this code. My problem is that I dont know how I could call the specific variable in the for loop that is needed to be changed.

My Code:

if isempty(k1_exact)

k1_exact = -1;

end

if isempty(k2_exact)

k2_exact = -2;

end

if isempty(k1_U)

k1_U = -3;

end

if isempty(k1_L)

k1_L = -4;

end

if isempty(k2_U)

k2_U = -5;

end

if isempty(k2_L)

k2_L = -6;

end

Answer 1

[Sahil Jain]

Hi Nick. You can try using the "eval" function for your purpose. The following code snippet demonstrates how you may go about it.

variables = ["k1_exact", "k2_exact", "k1_U", "k1_L", "k2_U", "k2_L"];
for i=1:length(variables)
    eval(strcat(variables(i), "=-", num2str(i)))
end

k1_exact = -1

k2_exact = -2

k1_U = -3

k1_L = -4

k2_U = -5

k2_L = -6

For every variable, we first create a string of the assignment expression. We then pass this string to the "eval" function to execute the operation.