diffuseProj: Predicts diffusion map projection from new data points
In wjawaid/bglab: Berthold Gottgens lab scRNA seq

Predicts diffusion map projection from new data points

1	diffuseProj(dm, x, data, distfun)

`dm`	Output from diffuseMat2 function
`x`	Matrix of new data points. Features in rows and cells in columns.
`data`	Original data used to generate diffusion map
`distfun`	A distance function that takes new data as first paramter and previous data as second variable returning a squared distance measure, with each sample in the rows and distance to previous data points in columns, e.g. function(x, y) (1 - cor(x, y))^2.