Cody

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

Solution 893759

Submitted on 23 May 2016 by Steve
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### Test Suite

Test Status Code Input and Output
1   Pass
x = [NaN 1 2 NaN 17 3 -4 NaN]; y_correct = [0 1 2 2 17 3 -4 -4]; assert(isequal(replace_nans(x),y_correct))

y = 0 last_non_NaN = 0 y = 0 1 last_non_NaN = 1 y = 0 1 2 last_non_NaN = 2 y = 0 1 2 2 y = 0 1 2 2 17 last_non_NaN = 17 y = 0 1 2 2 17 3 last_non_NaN = 3 y = 0 1 2 2 17 3 -4 last_non_NaN = -4 y = 0 1 2 2 17 3 -4 -4

2   Pass
x = [NaN 1 2 NaN NaN 17 3 -4 NaN]; y_correct = [ 0 1 2 2 2 17 3 -4 -4]; assert(isequal(replace_nans(x),y_correct))

y = 0 last_non_NaN = 0 y = 0 1 last_non_NaN = 1 y = 0 1 2 last_non_NaN = 2 y = 0 1 2 2 y = 0 1 2 2 2 y = 0 1 2 2 2 17 last_non_NaN = 17 y = 0 1 2 2 2 17 3 last_non_NaN = 3 y = 0 1 2 2 2 17 3 -4 last_non_NaN = -4 y = 0 1 2 2 2 17 3 -4 -4

3   Pass
x = [NaN NaN NaN NaN]; y_correct = [ 0 0 0 0]; assert(isequal(replace_nans(x),y_correct))

y = 0 last_non_NaN = 0 y = 0 0 y = 0 0 0 y = 0 0 0 0

4   Pass
x = [1:10 NaN]; y_correct = [ 1:10 10]; assert(isequal(replace_nans(x),y_correct))

y = 1 last_non_NaN = 1 y = 1 2 last_non_NaN = 2 y = 1 2 3 last_non_NaN = 3 y = 1 2 3 4 last_non_NaN = 4 y = 1 2 3 4 5 last_non_NaN = 5 y = 1 2 3 4 5 6 last_non_NaN = 6 y = 1 2 3 4 5 6 7 last_non_NaN = 7 y = 1 2 3 4 5 6 7 8 last_non_NaN = 8 y = 1 2 3 4 5 6 7 8 9 last_non_NaN = 9 y = 1 2 3 4 5 6 7 8 9 10 last_non_NaN = 10 y = 1 2 3 4 5 6 7 8 9 10 10

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