R: Pairwise Chi-squared distances

chiDist2 {SNFtool}

R Documentation

Pairwise Chi-squared distances

Description

Computes the Chi-squared distances between all pairs of data point given

Usage

chiDist2(A, B)

Arguments

`A`	A data matrix where each row is a different data point
`B`	A data matrix where each row is a different data point. If this matrix is the same as X, pairwise distances for all data points are computed.

Value

Returns an N x M matrix where N is the number of rows in X and M is the number of rows in M. element (n,m) is the squared Chi-squared distance between nth data point in X and mth data point in C

Author(s)

Dr. Anna Goldenberg, Bo Wang, Aziz Mezlini, Feyyaz Demir

Examples


## Data1 is of size n x d_1, 
## where n is the number of patients, d_1 is the number of genes, 
## Data2 is of size n x d_2, 
## where n is the number of patients, d_2 is the number of methylation
data(Data1)
data(Data2)

## Calculate distance matrices(here we calculate Euclidean Distance, 
## you can use other distance, e.g. correlation)
Dist1 = chiDist2(as.matrix(Data1), as.matrix(Data1))
Dist2 = chiDist2(as.matrix(Data2), as.matrix(Data2))

[Package SNFtool version 2.2.1 Index]