Hello.

I have this matrix:

cy            [,1]       [,2]       [,3]       [,4]       [,5]       [,6]
 [1,]  1.0000000  1.0000000 -0.5164570 -0.5164087 -0.4004139 -0.4003719
 [2,]  1.0000000  1.0000000 -0.5164570 -0.5164087 -0.4004139 -0.4003719
 [3,] -0.5164570 -0.5164570  1.0000000  1.0000000 -0.1186691 -0.1186972
 [4,] -0.5164087 -0.5164087  1.0000000  1.0000000 -0.1186995 -0.1187276
 [5,] -0.4004139 -0.4004139 -0.1186691 -0.1186995  1.0000000  1.0000000
 [6,] -0.4003719 -0.4003719 -0.1186972 -0.1187276  1.0000000  1.0000000
 [7,] -0.4058070 -0.4058070 -0.1150400 -0.1150706  0.9999826  0.9999824
 [8,] -0.4061715 -0.4061715 -0.1147942 -0.1148249  0.9999802  0.9999799
 [9,] -0.4061804 -0.4061804 -0.1147882 -0.1148189  0.9999801  0.9999799
[10,]  1.0000000  1.0000000 -0.5164570 -0.5164087 -0.4004139 -0.4003719
            [,7]       [,8]       [,9]      [,10]
 [1,] -0.4058070 -0.4061715 -0.4061804  1.0000000
 [2,] -0.4058070 -0.4061715 -0.4061804  1.0000000
 [3,] -0.1150400 -0.1147942 -0.1147882 -0.5164570
 [4,] -0.1150706 -0.1148249 -0.1148189 -0.5164087
 [5,]  0.9999826  0.9999802  0.9999801 -0.4004139
 [6,]  0.9999824  0.9999799  0.9999799 -0.4003719
 [7,]  1.0000000  0.9999999  0.9999999 -0.4058070
 [8,]  0.9999999  1.0000000  1.0000000 -0.4061715
 [9,]  0.9999999  1.0000000  1.0000000 -0.4061804
[10,] -0.4058070 -0.4061715 -0.4061804  1.0000000


I want to know the coordinates of the 1's only in the cy's lower triangle.


If I do cy%in%1 or cy ==1 I have this result:  [1]  TRUE FALSE FALSE
FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE  TRUE
 [13] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE  TRUE FALSE
 [25] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE  TRUE FALSE FALSE
 [37] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE  TRUE FALSE FALSE FALSE
 [49] FALSE FALSE FALSE FALSE FALSE FALSE FALSE  TRUE FALSE FALSE FALSE FALSE
 [61] FALSE FALSE FALSE FALSE FALSE FALSE  TRUE FALSE FALSE FALSE FALSE FALSE
 [73] FALSE FALSE FALSE FALSE FALSE  TRUE FALSE FALSE FALSE FALSE FALSE FALSE
 [85] FALSE FALSE FALSE FALSE  TRUE FALSE FALSE FALSE FALSE FALSE FALSE FALSE

[97] FALSE FALSE FALSE TRUE

 It seems that is only considering the principal diagonal.


I don't understand why...


Thank you,


Rui

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