Hi Ashaya KC,
I see there are three queries to be solved here.
- Adding or subtracting to the variables at random.
- Processing the data between specified lines.
- Maintaining consistency in adding or subtracting to the “Z” variable across the file.
Please find the potential solution for your query here.
- Consider a variable “randomSign” that would determine which operation to perform. If the variable takes a value 1, then perform addition operation, else perform subtraction operation.
randomSign = randi([0, 1]);
if randomSign == 1
% Add
vec = vec + percent * numel(vec);
else
% Subtract
vec = vec - percent * numel(vec);
end
- To process the file only between specified lines, let us maintain a variable “lineNumber”, and two other variables “startLine” and “endLine” that determine the limits of the file to be processed.
lineNumber = 0;
while ~feof(fid)
lineNumber = lineNumber + 1;
if lineNumber < startLine || lineNumber > endLine
continue;
end
% remaining code
end
- To maintain consistency in addition or subtraction for “Z” variable across the file, create a variable “zSign” outside the while loop that assumes a value 0 or a 1 and is not updated throughout the file.
zSign = randi([0,1]);
while ~feof(fid)
zvalue = vec(3);
% remaining code
if zSign == 1
% add
zvalue = zvalue + percent * zvalue;
else
% subtract
zvalue = zvalue - percent * zvalue;
end
vec(3) = zvalue;
end
To know more about the “randi” function, refer to the following link.
Hope this solution helps.
Thanks,
Ravi Chandra.
