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Re: st: Looping for STATA graphs using a string variable or a numeric with the labels including in titles


From   William Buchanan <william@williambuchanan.net>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: Looping for STATA graphs using a string variable or a numeric with the labels including in titles
Date   Fri, 13 Dec 2013 09:47:19 -0600

A quick guess is that your string variable includes embedded spaces.  Do you get the same error when you use compound double quotes around the local macro?

Sent from my iPhone

> On Dec 13, 2013, at 9:34, Sarah Gerver <sarah.gerver@phe.gov.uk> wrote:
> 
> Dear Statalisters,
> 
> I am desperately trying to figure out how to produce >130 line graphs on separate figures (i.e. I want >130 graphs).  I am trying to create a loop covering all values of a string variable (var_a) which itself is not being plotted.
> 
> I have had some success in producing all of the graphs if I encode var_a and use a while loop, however, I cannot figure out how to get the title of the graph to be the string labels on the numeric value. The code I have used is below:
> 
> encode var_a, gen(num_var_a)
> local i = 1
> while `i'<=135 {
> line var_b var_c if num_var_a== `i', xlabel(1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23, valuelabel angle(90)) ylab(0(25000)110000) name(gr`i', replace) ytitle(This is my y axis, size(small)) xtitle(This is my x axis) title("Tile line 1" "Title line 2" "line 3, where I want the label for num_va_a `i'", size(medium) color(black)) legend(off)  
> graph save "trust graphs `i'.gph", replace
> local i = `i'+1
> } 
> 
> 
> I have also tried the following using the original string for var_a:
> 
> levelsof var_a, local(loc_var_a) 
>  di ` loc_var_a'
> foreach i of local loc_var_a {
> di  `i'
> line var_b var_c if var_a == "`i'", xlabel(1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23, valuelabel angle(90)) name(gr`i', replace) ytitle(Y axis) xtitle(X axis title) title("First line of title" "second line of title" "third line: `i'", size(medium) color(black)) legend(off)  
> 
> }
> 
> I get the following error (where STG is the first string value of var_a:
> 
> STG not found
> r(111);
> 
> end of do-file
> 
> r(111);
> 
> Of note, I also get what appears to be one long string of codes when I first display  ` loc_var_a' prior to the foreach loop begins, which might be the issue and why it cannot then find one 3 letter code.
> 
> Any ideas on how I get my >130 line graphs with the value of the string code in my graph title so that I know which of the 130+ graphs is which (using either of these loop types or any other coding ideas)?
> 
> Many thanks for your help,
> 
> Sarah
> 
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