Error in (function (classes, fdef, mtable) : unable to find an inherited method for function ‘getValues’ for signature

Question

I was trying to convert the raster to vector/matrix using getValues and I am getting this error:
Error in (function (classes, fdef, mtable)  : unable to find an inherited method for function ‘getValues’ for signature ‘"character", "missing", "missing"

I have put the code below for reference.
#mosaic

Mosaic<- "Mosaic.tif"

#shapefile

shp <- "Tahsil Boundary2001.shp"

#Extacted Raster

gondia<- "extract.tif"

#convert raster to vectormatrix

nr <- getValues(gondia)

Oto Kaláb · Accepted Answer

I suppose that you want to use getValues from raster package. You have to create raster object with raster() function. In your case you just store string "extract.tif" into variable gondia so:
gondia <- "extract.tif"
gondia

results in
[1] "extract.tif"

Just try:
gondia <- raster("extract.tif")
nr <- getValues(gondia)

For further details see getValues documentation.

Error in (function (classes, fdef, mtable) : unable to find an inherited method for function ‘getValues’ for signature

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