Heat maps.Rmd

---
title: "Heat map"
author: "Jeff Hoover"
date: "November 19, 2018"
output: bookdown::pdf_document2
---

```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = FALSE)
warning = -1

library(ggplot2)
```


```{r}
#generate a random binary matrix
mat <- matrix(sample(c(0,1), 20*20, replace = TRUE), nrow = 20)

#heatmap with binary coloring pattern
random_heatmap <- heatmap(mat, scale = "none", Rowv = NA, Colv = NA, 
                          col = c("black", "white"), 
                          labRow = FALSE, labCol = FALSE,
                          main = "Random Binary Heatmap")
```



```{r}
#generate a random binary matrix
mat2 <- matrix(sample(c(0:5), 50*50, replace = TRUE), nrow = 50)

#heatmap with binary coloring pattern
random_heatmap2 <- heatmap(mat2, scale = "none", Rowv = NA, Colv = NA, 
                          col = heat.colors(256, alpha = 1), 
                          labRow = FALSE, labCol = FALSE,
                          main = "Randomly Generated Heatmap")
```


```{r}
#generate a random binary matrix
mat3 <- matrix(sample(c(0:10), 50*50, replace = TRUE), nrow = 50)

colfunc <- colorRampPalette(c("black", "white"))

#test of the colfunc
#plot(rep(1,10), col = colfunc(10), pch=19, cex = 3)

random_heatmap3 <-  heatmap(mat3, scale = "none", Rowv = NA, Colv = NA, 
                          col = colfunc(10), labRow = FALSE, labCol = FALSE,
                          main = "Randomly Generated Heatmap")
```