<div dir="ltr"><br><div><br></div><div>dear Grass community,</div><div><br></div><div>I've been looking around in the internet and can't find a solution yet:</div><div>dealing with remote sensing, I want to do a scatter plot of two or more bands, let's say they could be any raster for which you would like so see what's the correlation among them.<br>
</div><div>I've used frequently this tool in other software in the past, so I've found out that the Interactive scatter plot tool by Stepan is available in Grass 7, but:</div><div>1. I don't have 7 installed and I'm not sure I know how to (could try though), and</div>
<div>2. my final purpose is, after that, to perform some PCA or another type of axes transformation (kind of Tasselled Cap) on those original bands. So actually I need to work on the data, not just to visualize them.</div>
<div><br></div><div>In the last couple of days I've tried to to do this in R, which I'm not expert of (yet!), and this just opened more questions. Like: better to use R from Grass, or Grass from R?</div><div>Second: the processing of great rasters seems really time consuming, so maybe I'm getting mistaken somewhere... and didn't arrive to visualize the scatter plot yet.</div>
<div>I've gone through the grasswiki page on R-statistics several times already, but I probably need a kind of tutorial or other material available on the subject.</div><div><br></div><div>Any help/advice in this issue would be appreciated!</div>
<div>bye,<br></div><div><br></div><div>Anna</div><div><br></div><div>NB: I'm using Grass 6.4.3 on Xubuntu.</div><div><br></div><div><br></div></div>