CODEWITHSUNDEEP
rheatmap
gvdd
gvdd

Reputation: 27

How to create a Heatmap in R for one column of data?

I have the following data in R - a column showing the names of cities and a column showing growth of incomes. I would like to create a heat map using this data. How could i do this? Is it even possible to create heat maps for one column of data

say data is something like: 

City           Data
New York       780
LA             982
DC             111
Boston         893
Chicago        989

And continues on many rows. Thanks for your help!

Upvotes: 2

Views: 1684

Answers (1)

KoenV
KoenV

Reputation: 4283

It may make sense to have a heatmap for one column, if you want to visualize how close or how far away e.g. cities are regarding that 1 item measured.

# your data
df <- data.frame(
  City = c("New York", "LA", "DC", "Boston", "Chicago"),
  Data = c(780, 982, 111, 893, 989)
)

# calculate distance/dissimilarity matrix (a dist object)
distance <- dist(df$Data, diag = TRUE, upper = TRUE)

# transform to matrix and set the labels
distanceM <- as.matrix(distance)
rownames(distanceM) <- df$City
colnames(distanceM) <- df$City

# create heatmap
heatmap(distanceM)

# or without reordering and without dendrograms
heatmap(distanceM, Colv = NA, Rowv = NA)

type ?heatmap for more details

Please let me know whether this is what you want.

Upvotes: 1

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