Re: [R] Simple For Loop Help

[gpetris]

Hi Arun,

This seems to do what you are looking for:

Y <- matrix(rnorm(12), 4, 3)
Y

           [,1]       [,2]        [,3]
[1,] -1.0457177  0.7756343 -0.06063478
[2,] -0.8962113  1.5573704 -0.50137832
[3,]  1.2693872 -0.3654018  0.92606273
[4,]  0.5938409  0.8165564  0.03693769

X <- apply(Y, 1, which.min)
X

[1] 1 1 2 3

HTH,
Giovanni


Quoting "arun.gurubaramurugeshan" <arun.gurubaramuruges...@autozone.com>:

Hi,
I need help with the following.

I have a dataset Y with 200 observations and three variables Y1, Y2 & Y3. I
have to find the minimum of Y1, Y2 & Y3 and if the minimum is Y1 then I have
to assign 1 to a variable (Y4), if Y2 is the minimum then "2" to Y4  else
"3" to Y4. This is what I have done....

for (i in 1:200) if(Y1<Y2 &amp; Y1&lt;Y3) Y$Y4=1 else if (Y2&lt;Y3) Y$Y4=2
else Y$Y4=3

and R is throwing back this warning message

Warning messages:
1: In if (Y1 &lt; Y2 &amp; Y1 &lt; Y3) Y4 &lt;- 1 else if (Y2 &lt; Y3) Y4
&lt;- 2 else Y4 &lt;- 3 :
  the condition has length > 1 and only the first element will be used
2: In if (Y2 < Y3) Y4 <- 2 else Y4 <- 3 :
  the condition has length > 1 and only the first element will be used

Any help would be appreciated.

Thanks
Arun

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