::Free Statistics and Forecasting Software::

All rights reserved. The non-commercial (academic) use of this software is free of charge. The only thing that is asked in return is to cite this software when results are used in publications.

This free online software (calculator) computes notched boxplots for every variable (=column) of the multivariate dataset. A notch is drawn in each side of the boxes.

If the notches of two plots do not overlap this is strong evidence that the two medians differ (Chambers et al., 1983, p. 62).

Click here to edit the underlying code of this R Module.

Enter (or paste) a matrix (table) containing all data (time) series. Every column represents a different variable and must be delimited by a space or Tab. Every row represents a period in time (or category) and must be delimited by hard returns. The easiest way to enter data is to copy and paste a block of spreadsheet cells. Please, do not use commas or spaces to seperate groups of digits!

Send output to:
Browser Blue - Charts White Browser Black/White CSV MS Excel MS Word
Data X:
99.2 96.7 101.0 99.0 98.1 100.1 100.0 100.0 100.0 111.6 104.9 90.6 122.2 104.9 86.5 117.6 109.5 89.7 121.1 110.8 90.6 136.0 112.3 82.8 154.2 109.3 70.1 153.6 105.3 65.4 158.5 101.7 61.3 140.6 95.4 62.5 136.2 96.4 63.6 168.0 97.6 52.6 154.3 102.4 59.7 149.0 101.6 59.5 165.5 103.8 61.3
Names of X columns:
Cons Inc Price
Sample Range: (leave blank to include all observations)
From:
To:
Color
greywhiteblueredblackbrownyellow
Chart options
Width:
Height:
Title:
Label y-axis:
Label x-axis:

Click here to edit the underlying code of this R Module.

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Cite this software as:

Wessa P., (2008), Notched Boxplots (v1.0.5) in Free Statistics Software (v1.1.22-r6), Office for Research Development and Education, URL http://www.wessa.net/rwasp_notchedbox1.wasp/

The R code is based on :

Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988), The New S Language, Wadsworth & Brooks/Cole.

Chambers, J. M., Cleveland, W. S., Kleiner, B. and Tukey, P. A., (1983), Graphical Methods for Data Analysis., Wadsworth & Brooks/Cole.

Murrell, P. (2005), R Graphics, Chapman & Hall/CRC Press.

Source code of R module
1	z <- as.data.frame(t(y))
2	bitmap(file="test1.png")
3	(r<-boxplot(z ,xlab=xlab,ylab=ylab,main=main,notch=TRUE,col=par1))
4	dev.off()
5	load(file="createtable")
6	a<-table.start()
7	a<-table.row.start(a)
8	a<-table.element(a,hyperlink("http://www.xycoon.com/overview.htm","Boxplot statistics","Boxplot overview"),6,TRUE)
9	a<-table.row.end(a)
10	a<-table.row.start(a)
11	a<-table.element(a,"Variable",1,TRUE)
12	a<-table.element(a,hyperlink("http://www.xycoon.com/lower_whisker.htm","lower whisker","definition of lower whisker"),1,TRUE)
13	a<-table.element(a,hyperlink("http://www.xycoon.com/lower_hinge.htm","lower hinge","definition of lower hinge"),1,TRUE)
14	a<-table.element(a,hyperlink("http://www.xycoon.com/central_tendency.htm","median","definitions about measures of central tendency"),1,TRUE)
15	a<-table.element(a,hyperlink("http://www.xycoon.com/upper_hinge.htm","upper hinge","definition of upper hinge"),1,TRUE)
16	a<-table.element(a,hyperlink("http://www.xycoon.com/upper_whisker.htm","upper whisker","definition of upper whisker"),1,TRUE)
17	a<-table.row.end(a)
18	for (i in 1:length(y[,1]))
19	{
20	a<-table.row.start(a)
21	a<-table.element(a,dimnames(t(x))[[2]][i],1,TRUE)
22	for (j in 1:5)
23	{
24	a<-table.element(a,r$stats[j,i])
25	}
26	a<-table.row.end(a)
27	}
28	a<-table.end(a)
29	table.save(a,file="mytable.tab")
30	a<-table.start()
31	a<-table.row.start(a)
32	a<-table.element(a,"Boxplot Notches",4,TRUE)
33	a<-table.row.end(a)
34	a<-table.row.start(a)
35	a<-table.element(a,"Variable",1,TRUE)
36	a<-table.element(a,"lower bound",1,TRUE)
37	a<-table.element(a,"median",1,TRUE)
38	a<-table.element(a,"upper bound",1,TRUE)
39	a<-table.row.end(a)
40	for (i in 1:length(y[,1]))
41	{
42	a<-table.row.start(a)
43	a<-table.element(a,dimnames(t(x))[[2]][i],1,TRUE)
44	a<-table.element(a,r$conf[1,i])
45	a<-table.element(a,r$stats[3,i])
46	a<-table.element(a,r$conf[2,i])
47	a<-table.row.end(a)
48	}
49	a<-table.end(a)
50	table.save(a,file="mytable1.tab")

To cite Wessa.net in publications use:
Wessa, P. (2008), Free Statistics Software, Office for Research Development and Education,
version 1.1.22-r6, URL http://www.wessa.net/

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Software Version : 1.1.22-r6
Algorithms & Software : Prof. dr. P. Wessa
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Server : www.wessa.net

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