# [R] Help needed in R

From: AbouEl-Makarim Aboueissa <aaboueissa_at_usm.maine.edu>
Date: Mon, 03 Mar 2008 10:20:21 -0500

Dear ALL:

How I can find the number of observations less than each value in column one with indicator 1 in column two. Please see the data below.

For example: number of observations less than 1 with indicator 1 (including those 1 with indicator 1) =2

```                    number of observations less than 2 with indicator 1 (including those 2 with indicator 1) =11
number of observations less than 5 with indicator 1 (including those 5 with indicator 1) =33
number of observations less than 10 with indicator 1 (including those 10 with indicator 1) =43
number of observations less than 15 with indicator 1 (including those 15 with indicator 1) =46

```

(1, 2,5,10,15) are the values in column one with indicator 1 in column two.

which means I need to create a vector(2,11,33,43,46) for the data in column one.

With many thanks.

Abou

Here is the data:

Consider the following matrix:

data<-matrix(c(2,2,12,2,1,10,10,4,10,1,1,2,2,1,2,10,3,1,1,1,3,5,17,23,9,9,3,3,15,5,

```		  4,5,5,5,4,8,1,15,3,3,1,6,3,6,3,4,5,14,4,
0,0,0,0,0,1,1,0,1,1,0,1,1,0,0,1,0,1,0,0,0,1,0,0,0,0,0,0,1,1,0,1,1,1,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0),49,2)

[,1] [,2]
[1,]    2    0
[2,]    2    0
[3,]   12    0
[4,]    2    0
[5,]    1    0
[6,]   10    1
[7,]   10    1
[8,]    4    0
[9,]   10    1

[10,]    1    1
[11,]    1    0

[12,]    2    1
[13,]    2    1
[14,]    1    0
[15,]    2    0
[16,]   10    1
[17,]    3    0
[18,]    1    1
[19,]    1    0
[20,]    1    0
[21,]    3    0
[22,]    5    1
[23,]   17    0
[24,]   23    0
[25,]    9    0
[26,]    9    0
[27,]    3    0
[28,]    3    0
[29,]   15    1
[30,]    5    1
[31,]    4    0
[32,]    5    1
[33,]    5    1
[34,]    5    1
[35,]    4    0
[36,]    8    0
[37,]    1    0
[38,]   15    0
[39,]    3    0
[40,]    3    0
[41,]    1    0
[42,]    6    0
[43,]    3    0
[44,]    6    0
[45,]    3    0
[46,]    4    0
[47,]    5    0
```
[48,] 14 0
[49,] 4 0

AbouEl-Makarim Aboueissa, Ph.D.
Assistant Professor of Statistics
Department of Mathematics & Statistics
University of Southern Maine
96 Falmouth Street
P.O. Box 9300
Portland, ME 04104-9300

Tel: (207) 228-8389
Fax: (207) 780-5607
Email: aaboueissa_at_usm.maine.edu

aboueiss_at_yahoo.com
Office: 301C Payson Smith

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