search for: sandard

Dear all I am trying to learn R I was trying to calculate standard deviation here are the commands and outputs in R > sd(Ht_cm[type=='SD'])[1] 3.283605> sd(Ht_cm[from_treeline=='above'])[1] 16.83289> sd(Ht_cm[type=='SD'][from_treeline=='above'])[1] NA> the problem is that, i could not understand why the third command could not give any result.

Hi List, I''ve followed and read several guides for getting recaptcha working with a site but I keep coming across this problem. The recaptcha images look...weird: This image is taken with the "white" theme, however the sandard one is exactly as weird. I can''t work out what is causing this: http://www.mattharrison.org/images/recaptcha-weird-look.JPG Any tips appreciated.

What have I missed I have a .rhtml with the sandard form parameters <%= image_submit_tag("excel.gif", :alt => "Download List to Excel", :border => 0, :name => ''render_action'', :value => ''excel'' ) %> Which genenerates I believe a valid html fragment for a submit button. &lt...

A quick question: Is there anywhere a listing of the RGB components of the named colours listed by colors()? For example, where would I find the RGB for "orange1" or "salmon"? When I look at an EPS file from R where I have used these colours, it seems that for: "salmon": 0.9804 0.5020 0.4471 rgb "orange1": 1 0.6471 0 rgb However, this is a tedious way