Hi Teresa,<br><br>sorry for replying so late, i had some personal issues. well I have some difficulties with this technique since I have statistically significant values both negative and positive, so when i do set cmin or cmax, it will block out the others. Is there a way to set it to absolute values?<br>
<br>With regards to scorr, I am of the understanding that grads correlates the final spatial distribution of both and thus producing one value. I guess for statistical significance one can use the values on statistics books, and also consider the resolution of the image to obtain n<br>
<br>Regards,<br><br>James<br><br><div class="gmail_quote">On 20 May 2011 17:41, <span dir="ltr"><<a href="mailto:tcavazos@cicese.mx">tcavazos@cicese.mx</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Hi,<br>
<br>
A simple way for tcorr: look at the statistically significant values for<br>
correlation in a statistics book; then according to your n-1 observations<br>
get the threshold values for the level of interest (p<0.05 or p<0.01).<br>
<br>
In grads you you can black out the values lower than those thresholds to<br>
display only the significant ones. Also you can set a minimum value to<br>
plot. For example, if your significant correlation at the 95% level is<br>
0.45:<br>
<br>
"set cmin 0.45"<br>
<br>
By the way how do you calculate the scorr, do you only average the spatial<br>
window after calculating the tcorr?<br>
<br>
The spatial significance is much more complicated...I am also interested<br>
in that, if anyone has it. It may require a bootstrap...<br>
<br>
Tereza Cavazos<br>
<div><div></div><div class="h5"><br>
<br>
> Dear gradsusrs,<br>
><br>
> I have a question about scorr and tcorr functions. Is there a way to<br>
> obtain<br>
> the p-value in this cases? i.e. one value for scorr and map value for<br>
> tcorr<br>
><br>
> Or anything of the sort?<br>
><br>
> Regards,<br>
><br>
> James<br>
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