Dear list, I've been trying to use the "Calculator" algorithm from Modeler-only tools in QGIS 2.1 modeler (or SEXTANTE modeler?) because I read in User Guide it is a "simple arithmetic calculator that you can use to modify numerical values". So, I need to modify inside a model some numerical values but the only other help I have found inside this algorithm is "You can refer numerical values in you formula, using single-letter variables, as follows:a->variable_name" (sic).
English is not my language so maybe there is something I couldn't catch from this help. I tried to find an example inside the Example Models too, but there are not use cases. Therefore, I'm hoping you can help me to figure out how to use this "Calculator" algorithm to obtain the squared value of a numerical entry and use the result in a r.mapcalculator opertation. Let us say some user enters a value of "5", how can I get "25.0" and then use this 25 in a raster calculation (r.mapcalculator) formula (A/25.0)? Thank you all for your always useful help. --- Yasser Said López de Olmos Reyes Laboratorio de Manejo de Recursos Naturales Universidad Autónoma Metropolitana, Unidad Iztapalapa
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