Oscar Perpiñán questions

Oscar Perpiñán answers

• Methods for doing heatmaps, level / contour plots, and hexagonal binning
• How to legend a raster using directly the raster attribute table and displaying the legend only for class displayed in the raster?
• R equivalent of MATLAB's fmincon for constrained optimization?
• Estimate the gradient of an undefined surface
• R: overlay plot on levelplot
• R: count non-NAs in a raster stack
• Creating a list of raster bricks from a multivariate netCDF file
• scatter.smooth R function - color
• Elegant way to solve ddply task with aggregate (hoping for better performance)
• Convert daily to weekly/monthly data with R