Displaying 3 results from an estimated 3 matches for "data_matrix".
2011 Aug 08
1
heatmap is producing unwanted horizontal and vertical lines?
...rainer...
I have an csv file that contains a grid of 300x300 data points. Each point represents
a 1Km square on a map. Each point is either a floating point number or NA. I load the
data in with:
data <- read.csv("matrix.csv", sep=',')
Convert the data to a matrix with:
data_matrix <- data.matrix(data)
and then produce the heatmap with:
data_heatmap <- heatmap(data_matrix,Rowv=NA,Colv='Rowv',margin=c(0,0))
The heatmap is displayed in a separate window as expected and looks correct apart
from fine white banding lines spaced out evenly over the image runnin...
2011 Jan 05
1
Heat map in R
...02
D 1498 03
E 2294 03
F 2485 03
G 1560 04
H 3759 04
I 2792 05
J 7081 05
K 1922 06
. . .
. . .
. . .
ZZZ 1354 43
My code in R is something like this:
data<-read.table("/Users/jsmt/desktop/test.txt",header=T)
data_matrix<-data.matrix(data)
data_heatmap <- heatmap(data_matrix, Rowv=NA, Colv=NA, col = cm.colors(256),
scale="column", margins=c(5,10))
I end up getting a heat map split into 3 columns: sample, depth, gene and
the colours are just in big blocks that don't mean anything.
Can anyone...
2012 Oct 11
0
Ptak and Candpara
...para to
perform the Parafac factorizationor of a tensor.
The results are not encouraging as I expected, I'm starting a phase of
analysis to see if there are errors.
I pose a question and I hope you can help me.
The command to run the factorization is:
## CANDECOMP/PARAFAC
results<- CANDPARA(data_matrix, dim=3)
summary(results)
U<-results[[1]]$v
V<-results[[2]]$v
W<-results[[3]]$v
data_matrix is a tensor of 943x1682x4.
what I want understand is: U, V, W, are really the three factors that
I should get from factorization?
I hope someone can help me.
Thank you.
giuseppe