How to identify specific ranges of regions in an array which add up to a number?

I have created a binary matrix (1xlength). I need MATLAB to go through the matrix and spit out the regions (region lengths can vary between 40 and 60 spaces) that add up to a given number, lets say 50.

I have no clue how to approach this. Any help is appreciated. Thanks!

Answer 1

[Image Analyst]

Pretty trivial if you have the Image Processing Toolbox. Do you? Type ver to find out.

labeledMatrix = binaryMatrix;
measurements = regionprops(labeledMatrix, 'Area');
allAreas = [measurements.Area]; % Extract from structure array to numerical array.
area50RegionIndexes = find(allAreas == 50); % Indexes of regions whose area = 50.