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copied!<p>Also, <code>image</code> could be helpful:</p> <pre><code>#matrix with the part of your data 10x10 you uploaded mat <- as.matrix(read.table(text = "0 0 0 0 0 0 0 0 0 0 41 10 2 0 0 0 0 0 0 0 75 36 20 9 4 2 1 0 0 0 91 65 47 31 20 13 8 5 3 2 97 78 64 47 35 25 18 12 8 5 99 88 76 63 50 39 29 22 16 11 99 93 85 74 63 52 42 32 25 19 99 96 91 83 73 64 53 44 35 28 99 98 94 88 81 72 64 54 46 37 99 98 96 92 87 80 72 64 55 47")) #neccessary step to `image` the expected. read `?image` t_mat <- t(mat[ncol(mat):1,]) #basic plot image(t_mat, col = colorRampPalette(c("blue", "red"))(10), axes = F) #creaty matrix with `NA`s and fill #only the values you want to appear yellow. #here: say 45 to 55 yellows <- matrix(nrow = nrow(t_mat), ncol = ncol(t_mat)) yellows[which(t_mat > 45 & t_mat < 55)] <- t_mat[which(t_mat > 45 & t_mat < 55)] #overlay "yellows" to basic plot image(yellows, col = rgb(1,1,0,1/2), add = T) </code></pre> <p>The plot looks:</p> <p><img src="https://i.stack.imgur.com/z4pjt.png" alt="enter image description here"></p> <p>P.S. I guessed that's what the yellow borders are for. Sorry if I misunderstood.</p> <p><strong>EDIT</strong></p> <p>Added example <code>legend</code> and labels:</p> <pre><code>title(main = "imageplot", xlab = "x axis", ylab = "y axis") legend(x = 0.6, y = 1.15, legend = c("<45", "45-55", ">55"), fill = c("blue", rgb(1,1,0,1/2), "red"), xpd = T, ncol = 3) </code></pre> <p><strong>EDIT2</strong></p> <p>Added labels to both axes:</p> <pre><code>#I guess you'll need to use `axis(1, at = seq(0,1,0.0101), labels = seq(1, 100, 1))` #but I'm not sure axis(1, at = seq(0,1,0.11), labels = seq(1, 10, 1)) axis(2, at = seq(0,1,0.11), labels = seq(1, 10, 1)) </code></pre>

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