channelHeatmap: Create layout plot of flowcell
In grimbough/IONiseR: Quality Assessment Tools for Oxford Nanopore MinION data

Description Usage Arguments Value Examples

Creates a plot representing the layout of a MinION flow cell. Each circle represents an individual channel with the intensity relecting a specified sequencing metric. This function is a more generalised version of layoutPlot, allowing the user to map any value the like on the channel layout.

1	channelHeatmap(data, zValue)

`data`	A data.frame. Should have at least two columns, one of which has the name 'channel'.
`zValue`	Character string specifying the name of the column to be used for the colour scaling.

Returns an object of gg representing the plot.

library(dplyr)
if( require(minionSummaryData) ) {
   data(s.typhi.rep2, package = 'minionSummaryData')
   ## calculate and plot the mean number of events recorded by each channel
   avgEvents <- left_join(readInfo(s.typhi.rep2), eventData(s.typhi.rep2), by = 'id') %>% 
   group_by(channel) %>% 
   summarise(mean_nevents = mean(num_events))
   channelHeatmap(avgEvents, zValue = 'mean_nevents')
}