I am working on crop water stress monitoring. I have thermal images of different crop genotypes of same day. I would like to plot temperature values for genotypes as black and white horizontally spaced diagram as shown in image that shows black colour as higher temperature and white colour as low temperatures. Pleas help me. The link of the demo data for 20 genotypes is given below-
Demo Temperature data for 20 genotypes (First column is Genotype No., second column is min temp and third column is max temp.)
A similar figure from different study is attached herewith.