how to write for loop to write in my data set if there is a signal

How can I wirte a for loop so it will wirte a 1 into 500 cells prior to their already being a 1 into my data set. I have 99 data sets.

[Dyuman Joshi]

It's not clear what you want.

Show an example, what you have and what you want to obtain.

[Pauline]

I want there to be a one instad of a 0 in collum 6. How do I write a do loop fo all data sets?

Answer 1

[Nirupama Nagarathinam]

Hi @Pauline,

Your question is not very clear. But with the little understnading I got from the question, I guess you want to replace "0" with "1" using a for loop.

Find below a sample code for the same :

A = [0 0; 2 3]; %sample matrix
[r,c]=size(A); %obtaining the number of rows and columns of the matrix
for i=1:r %Iterating through all rows of matrix A
    for j=1:c %Iterating through all columns of matrix A
        if A(i,j) == 0 %Checking if the element in matrix A has value 0
            A(i,j) = 1; %Setting the value to 1
        end
    end
end
disp(A)

     1     1
     2     3

If you want to do this change for 99 different data sets, then you can convert and save this code to a function as follows:

function replacingZero(input_dataset)
[r,c]=size(input_dataset); %obtaining the number of rows and columns of the dataset
for i=1:r %Iterating through all rows of dataset
    for j=1:c %Iterating through all columns of dataset
        if input_dataset(i,j) == 0 %Checking if the element in dataset has value 0
            input_dataset(i,j) = 1; %Setting the value to 1
        end
    end
end
end