how can i split mtrix to three ?

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RADWAN A F ZEYADI 2022-1-16

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评论： Image Analyst 2022-1-19

hi

i have matrix m=153*71 i need to extract from it 3 matrices with dinsion 51*71 ?

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Answer 1

Voss 2022-1-16

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编辑：Voss 2022-1-16

Here is one possible way, if A is your matrix:

A1 = A(1:51,:);
A2 = A(52:102,:);
A3 = A(103:153,:);

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Answer 2

Image Analyst 2022-1-16

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https://ww2.mathworks.cn/matlabcentral/answers/1630050-how-can-i-split-mtrix-to-three#answer_875550

Here is a similar question and answer:

https://www.mathworks.com/matlabcentral/answers/1629495-divide-array-into-3-parts#answer_875085

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RADWAN A F ZEYADI 2022-1-19

thank you ,,i have matrix m 153 71

i need to exrtact 51 71 from m

when i do i obtain the same picture of the first matrix for example

m1=m(1:51,:);

m2=m(52:103,:)

m3=m(103:153,:)

i have obtained m3 and m2 the same pictures with m1 infact in the m matrix they are totlay different

mage from m1 infact on the whole matrix they are different

Image Analyst 2022-1-19

Sorry that's not true. Look:

m = randi(99, 153, 5)
m = 153×5
   2    19    99     1
  35    44    11    85
  25    58     1    45
  11    81    94    35
   9    20    54    31
  96    69    66    64
  14    63    52    62
  31    10    95    36
  72    93     3    98
  97    65    97    99
m1=m(1:51,:)
m1 = 51×5
   2    19    99     1
  35    44    11    85
  25    58     1    45
  11    81    94    35
   9    20    54    31
  96    69    66    64
  14    63    52    62
  31    10    95    36
  72    93     3    98
  97    65    97    99
m2=m(52:103,:)
m2 = 52×5
   8    41    41    39
  16     7    58    51
  10    94    82     5
  65    95    71    67
  60    78    28    61
  91    41    55    28
   5    20    92     6
  52    43    73    24
  87    83     1    41
  99    85    63    98
m3=m(103:153,:)
m3 = 51×5
  19    89    71    42
  78    10    92    38
  48    93    10    91
  32    26    37    67
  68    92    47    93
  28    16     3    54
  40     2     4    92
   2    76    82    30
  62    20    15    93
  53    43    36    30

You can see that obviously they are not the same. You must have done something else to overwrite all the matrices with m.

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Answer 3

RADWAN A F ZEYADI 2022-1-19

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https://ww2.mathworks.cn/matlabcentral/answers/1630050-how-can-i-split-mtrix-to-three#answer_877485

thank you just the last thing i have 2 vectors and i want to compute the Confidence intervals 95"% for both of them how could be done ?

both of them 51*1 i upload the picture to check the figure

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RADWAN A F ZEYADI 2022-1-19

i have exracted them from 2 matrixes 51*71 for both

Image Analyst 2022-1-19

So you have either 51 or 71 curves? If so, for each time point you can pass those values into fitdist() to get the distribution and CDF from which you can get the 2.5% and 97.5% values of the CDF which enclose 95% of the values.

If you can't figure it out, attach the matrix in a .mat file.

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