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...39; but im always getting error " 'x' must be numeric " ... I think im getting that error because of the header which is not numeric. Any help would be appreciated. Thanks guys. Ivan. -- View this message in context: http://www.nabble.com/Newbie-Question-About-Histograms-tp21713626p21713626.html Sent from the R help mailing list archive at Nabble.com.

Hi All, I've been having a little trouble with creating a loop that will run a a series of t.tests for inspection, Below is the code i've tried, and some checks i've looked at. I've used the get(paste()) idea as i was told previously that the use of the eval should try and be avoided. I've run a single syntax to check that my systax is correct and works without any problems