Trying to change the amount of decimal points

Question

Olivia Rose 2022-3-3

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1663174-trying-to-change-the-amount-of-decimal-points

回答： Star Strider 2022-3-3

This is what I have for the input function

weightArray=[68.6611,8.7929,71.6766,44.1901,76.2861,66.1515,22.6083,36.9491,52.6495,65.6995]
dailyMaterialSum = sum(weightArray,'All')

The output answer is correct, but I need it to only be at 2 decimal points. If I input fprintf('%10.2f \n', dailyMaterialSum) It produces the correct form of the answer, but it isn't considered correct because it's a seperate answer. Where am I supposed to place the fprintf to be correct?

These are the output equations

weightArray = (1 + (100 -1)*(rand (10,1)))'
dailyMaterialSum = MaterialSum(weightArray)

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Answer 1

Star Strider 2022-3-3

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1663174-trying-to-change-the-amount-of-decimal-points#answer_909279

在 MATLAB Online 中打开

Probably the easiest is to use the round function:

weightArray=[68.6611,8.7929,71.6766,44.1901,76.2861,66.1515,22.6083,36.9491,52.6495,65.6995]
weightArray = 1×10
   68.6611    8.7929   71.6766   44.1901   76.2861   66.1515   22.6083   36.9491   52.6495   65.6995
dailyMaterialSum = sum(weightArray,'All')
dailyMaterialSum = 513.6647
format short g
dailyMaterialSum = round(dailyMaterialSum, 2)
dailyMaterialSum = 
       513.66
format bank
dailyMaterialSum = round(dailyMaterialSum, 2)
dailyMaterialSum = 
        513.66