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# Re: st: STATA graph question: Combining Histograms

 From Christoph Engel <[email protected]> To [email protected] Subject Re: st: STATA graph question: Combining Histograms Date Wed, 17 Aug 2011 23:26:40 +0200

```Marlis,

If all you want is 10 graphs in one line, the following would do

hist response26, freq, by(group, cols(10))

maybe together with

hist response26, freq, by(group, cols(10)) xsize(10) ysize(2)

```
If you also want to change the order, you need memory graphs. You could do the following
```
forvalues i = 1/10 {
```
hist response26 if group == `i', freq title("group `i'") name(group`i', replace)
```    }

and could then arrange them at will, using

graph combine group2 group4 group6

Does that help?

Christoph Engel

Am 17.08.2011 22:15, schrieb Marlis Gonzalez Fernandez:
```
```Nick-

Excuse my naiveté... have not figured out all the rules yet.

Yes I did:

. histogram response26, freq

and repeated for 10 different responses thus generating 10 different histograms that I would like to combine (basically as they are) side by side so people can visually compare the frequencies between questions. Not worried about labeling at this point.

Used:

. graph combine graph1 graph2 graph3

But that is not what I am looking for.

Any thoughts?

Thanks.

M. González

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Nick Cox
Sent: Wednesday, August 17, 2011 3:32 PM
To: [email protected]
Subject: Re: st: STATA graph question: Combining Histograms

We can let -rep78- of the auto data serve as a Likert scale. (The term
Likert honours Rensis Likert.)

Without code examples of what you tried what you want remains a bit
vague. Do you want axis scales? labels on the bars? or what?

Is this what you want?

. sysuse auto
(1978 Automobile Data)

. histogram rep78, freq

. tab rep78

Repair |
Record 1978 |      Freq.     Percent        Cum.
------------+-----------------------------------
1 |          2        2.90        2.90
2 |          8       11.59       14.49
3 |         30       43.48       57.97
4 |         18       26.09       84.06
5 |         11       15.94      100.00
------------+-----------------------------------
Total |         69      100.00

. histogram rep78, freq discrete barw(0.8)  yaxis(1 2) yla(6.9 "10"
13.8 "20" 20.7 "30" 27.6 "40" , axis(2)) ytitle("Percent", axis(2))

Here I did it by mental arithmetic after noting that 69 is 100% and 6.9 is 10%.

Nick

On Wed, Aug 17, 2011 at 8:19 PM, Marlis Gonzalez Fernandez
<[email protected]>  wrote:

```
```I am trying to combine frequency histograms for several questions into one graph.  Each variable has the answers to questions in a likert scale (always, frequently, infrequently, never, don't know).  I want to plot the frequency and percent for each question side by side.  Have not found a good way to do this.
```
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```
```

--
_________________________________________________________________
Prof. Dr. Christoph Engel
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Erforschung von Gemeinschaftsgütern
Max Planck Institute for Research on Collective Goods
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```