Find the some of a row with numbers greater than -1 in matlab

Numbers in row 1 are: 103, 61, 0, 0, 62, -999, -999, 0, 0, 2

I'm using sum(B,2)

but how can I sum all rows greater than or equal to 0

[DGM]

Explain what it means to "sum all rows greater than or equal to 0"

and what that has to do with numbers greater than -1

and what that has to do with the values in row 1.

[Aurelius Hardy]

Maybe I'm looking at this wrong. Row 1 includes inches of of snow received each day. Some days didn't have snow recorded so the -999 was placed there. Therefore, that sum shouldn't be included in the sum of row 1. So I want to get the sum of days that had snow >/= 0.

Answer 1

[Walter Roberson]

B = [103, 61, 0, 0, 62, -999,  -999, 0, 0, 2]

B = 1×10

103 61 0 0 62 -999 -999 0 0 2

sum( max(B, 0), 2)

ans = 228

[Aurelius Hardy]

thank you!

[Walter Roberson]

Note that sum(B(B>0)) would only work for a single row, whereas the max solution works for multiple rows

[Image Analyst]

@Aurelius Hardy please click the "Accept this answer link" to award @Walter Roberson reputation points and let others know it's already been solved. Thanks in advance 🙂.