I would like to combine about 200 graphs in one pdf so that each graph is displayed below each other in one column and the original aspect ratio is kept. However if I use the code below I get a combined pdf where each graph is very long horizontally and very small vertically.


Code:
local graphs ""
foreach var of varlist _all {
line `var' year, name(`var') title(`var') graphregion(color(white)) xlabel(1980(2)2010,labsize(small)) ytitle("")
local graphs "`graphs' `var'"
}
gr combine `graphs', col(1) ysize(20) graphregion(color(white))
gr export check.pdf, replace