Plot values of matching string

Hi ,

I am running memory analysis test every 10sec on my Linux board and I need to plot the values of Usage of a certain process .

For Ex : , in the attached testme.txt , I need to search for string "Webkit" and get the Uss used by Webkit and plot them

In the given test file , it would be equivalent to plotting [88416, 27927] . Please note that the extra K needs to be eliminated

Answer 1

[Sameer]

Hi @pavan nittala

Here's a sample script to extract the necessary data as per you requirement, and plot it:

% Read the contents of the text file
filename = 'testme.txt'; % Replace with your actual file path
fileContent = fileread(filename);
% Use a regular expression to find the lines with "Webkit" and extract the Uss values
pattern = '\s*\d+\s+\d+K\s+\d+K\s+\d+K\s+(\d+)K\s+Webkit';
matches = regexp(fileContent, pattern, 'tokens');
% Convert the extracted values from strings to numbers
ussValues = cellfun(@(x) str2double(x{1}), matches);
% Plot the values
figure;
plot(ussValues, '-o');
title('Uss Usage of Webkit Process');
xlabel('Sample Number');
ylabel('Uss (KB)');
grid on;

Please refer to the below MathWorks documentation link:

https://www.mathworks.com/help/matlab/ref/regexp.html

Hope this helps!