how to find the days haven't been precipitations in a vector or a file.

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EKAIN 2022-12-2

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评论： EKAIN 2022-12-4

Need to solve this, every help would be nice, thanks.

Specially the most difficul one is to find the days when have been no precipitations.

Implement a function called computePrecipitationStats which, given the vector that contains the daily precipitations and a threshold value, returns the average daily precipitation, the standard deviation of the daily precipitations, the number of days with no precipitation and vector containing the days when the precipitation was above the specified threshold.

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EKAIN 2022-12-2

I need to know how to calculate how many elements there are with value 0 in the vector. I have written the exercise to put people in context of the problem.

Jan 2022-12-2

在 MATLAB Online 中打开

sum(x == 0)
% or:
numel(x) - nnz(x)

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Answer 1

Image Analyst 2022-12-2

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1869362-how-to-find-the-days-haven-t-been-precipitations-in-a-vector-or-a-file#answer_1118662

在 MATLAB Online 中打开

Hints:

v = randi([0, 5], 1, 20)
v = 1×20
     5     2     3     1     5     1     4     4     3     0     5     3     5     2     2     5     0     2     3     4
numZeros = sum(v == 0)
numZeros = 2
valuesAboveThreshold = v(v > 3) % 3 is the threshold
valuesAboveThreshold = 1×8
     5     5     4     4     5     5     5     4