title: creating folder inside directory in R and save results there with the name of file name to save plots
body: <p></p>
  
  <p>I have data for 40 buildings. Each building contains folders like CO2, Temperature, heat. then inside each folder there is data for different regions of house. For instance, for CO2, I have data (time series collection) for hallway, bedroom, living room etc. I need heatmaps for all these data file. So far, what i could do is, I wrote a code to go inside each directory, then each folder and then access files and draw heatmap inside Rstudi. Code is:</p>
  
  <pre><code>setwd("C:/Users/...")
  folders &lt;- list.dirs(full.names = TRUE)
  
  result &lt;- sapply(folders[-1], function(x){
  res&lt;-lapply(files, function (x) {
  [some heatmap function]
  P1&lt;- ggplot(df, aes(Time, Date, fill =reading)) + geom_tile(colour = "grey") + scale_fill_gradientn(colours=c("darkblue", "red", "yellow"),   values=rescale(c(0, 1000, 2000)),  guide="colorbar")+scale_x_discrete(breaks = lab1)
  plot(P1)
    })})
  </code></pre>
  
  <p>what i actually want is, to store the heatmap results of each file in the same folder with the name of the folder+name of the file (like CO2.hallway.jpeg etc). I am trying various codes since last 2 days but none is working for me. can anyone please help me with this. I'll very grateful to you.</p>