remove numbers in an array that are equal to the previous number in matlab with a logic operator in matlab

You can use the diff function to find the difference between consecutive elements in the array. If the difference between two consecutive elements is zero, then they are the same number. You can use this information to create a logical index that marks the positions of the repeated numbers. Finally, you can use this index to remove the repeated numbers from the original array using the logical indexing.

Here's an example:

main.m
% example array
arr = [1 1 2 3 3 4 4 4];

% find index of repeated numbers
diffs = diff(arr) == 0;
indexes = [false diffs];

% remove repeated numbers
unique_arr = arr(~indexes);
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In this example, the diff function is used to find which elements in arr are equal to their previous elements. This creates a logical array diffs, which is then combined with an initial false to create a logical index indexes. Finally, unique_arr is created by using the logical index to remove the repeated numbers from arr.