Suppose I have an row x col array, called A, for example. In column 10, say, there are many different values. Some of these are 0. How do I change A so that all rows that contain 0 in column 10 are deleted?

Find all rows that are non-zero in that column using e.g. rows_to_keep = findall(...) Create a new matrix without those rows by indexing, e.g. A[rows_to_keep, :] Note, you cannot change the shape of an existing matrix.

Change an array by removing all rows that have a particular value in a particular column

New to Julia

baggepinnen July 2, 2020, 10:05am 3

Try

rows_to_keep = A[:,10] .!= 0

2 Likes

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Change an array by removing all rows that have a particular value in a particular column

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