Problem 73. Replace NaNs with the number that appears to its left in the row.

Created by Cody Team

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Replace NaNs with the number that appears to its left in the row.

If there are more than one consecutive NaNs, they should all be replaced by the first non-NaN value to the immediate left of the left-most NaN. If the NaN is in the first column, default to zero.

For example, if

x = [NaN  1   2  NaN NaN 17  3  -4 NaN]

then

y = [ 0   1   2   2   2  17  3  -4  -4]

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Last Solution submitted on Dec 07, 2025

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1 Comment

Richard Zapor on 29 Apr 2012

The problem does not limit the array to a single row. Add a few cases of multiple rows or define as single row.

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Problem 73. Replace NaNs with the number that appears to its left in the row.

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Problem 73. Replace NaNs with the number that appears to its left in the row.

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Last 200 Solutions

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