How to calculate mean and standard deviation for loops?

Question

Sumit Saha 2021-7-11

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/876378-how-to-calculate-mean-and-standard-deviation-for-loops

评论： Sumit Saha 2021-7-11

story_Acc_FN_UL0_S1_5 = randn(1,10);
story_Acc_FN_UL0_S2_5 = randn(1,10);
story_Acc_FN_UL0_S3_5 = randn(1,10);
story_Acc_FN_UL0_S4_5 = randn(1,10);
story_Acc_FN_UL0_S5_5 = randn(1,10);
for uu = 1:10
story_Acc_FN_UL0_R_rup_5(1,uu) = mean(story_Acc_FN_UL0_S1_5(1,uu),story_Acc_FN_UL0_S2_5(1,uu),story_Acc_FN_UL0_S3_5(1,uu),story_Acc_FN_UL0_S4_5(1,uu),story_Acc_FN_UL0_S5_5(1,uu));
std_dvt(1,uu) = std(story_Acc_FN_UL0_S1_5(1,uu),story_Acc_FN_UL0_S2_5(1,uu),story_Acc_FN_UL0_S3_5(1,uu),story_Acc_FN_UL0_S4_5(1,uu),story_Acc_FN_UL0_S5_5(1,uu));
end 

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Answer 1

ANKUR KUMAR 2021-7-11

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/876378-how-to-calculate-mean-and-standard-deviation-for-loops#answer_744488

在 MATLAB Online 中打开

You don't need to use loop for that. You can use cat command to concatenate, and then use mean and std functions to the matrix itself.

story_Acc_FN_UL0_S1_5 = randn(1,10);
story_Acc_FN_UL0_S2_5 = randn(1,10);
story_Acc_FN_UL0_S3_5 = randn(1,10);
story_Acc_FN_UL0_S4_5 = randn(1,10);
story_Acc_FN_UL0_S5_5 = randn(1,10);
matrix=cat(1,story_Acc_FN_UL0_S1_5,story_Acc_FN_UL0_S2_5, story_Acc_FN_UL0_S3_5, story_Acc_FN_UL0_S4_5, story_Acc_FN_UL0_S5_5)
matrix = 5×10
    0.5803    0.2545    1.3201    1.1169    1.1713    0.6641    0.6268    0.1792    0.5207   -0.8742
    0.2123   -1.1177   -0.7340   -0.4116    1.6859    0.4254   -0.0838   -1.3029    0.2514   -0.0004
   -0.1874   -1.3762    0.4546   -1.2224    0.4418    1.2452    0.7849    2.4942   -0.3359   -0.7775
   -0.5222    2.1919   -0.1692    0.7816    0.0996    0.9557   -0.5402    0.5236    0.8086   -0.5950
    1.0547    0.4665   -0.0449    0.7405   -0.2555   -1.1399    0.4181   -0.7332   -2.2922    1.3358
meanvalue=mean(matrix)
meanvalue = 1×10
    0.2276    0.0838    0.1653    0.2010    0.6287    0.4301    0.2412    0.2322   -0.2095   -0.1823
stdev=std(matrix)
stdev = 1×10
    0.6211    1.4313    0.7717    0.9834    0.7920    0.9301    0.5458    1.4571    1.2385    0.9139