write data using xlsReadWrite

Hi Ive come up with this code to read my file, but receive an error that I ve
no idea how to fix. can some one help.

read<-read.xlsx("D:\\FYP\\image\\Cropped
Images\\user227\\user227forger.xlsx", sheetName="Sheet1", rowIndex="1",
colIndex="varLH2y", colClasses="character", row.names=TRUE)
Error in colIndex - 1 : non-numeric argument to binary operator

here is an example of my data in .xlsx

	      varLH2x	       varLH2y	       varHH2x	        varHH2y	       varLL2x	      
varLL2y	       varHL2x	       varHL2y
1	4967.552716	12278.95794	679.3101705	254.2841431	4480777.986	3792655.605
2149.541058	827.9458738
2	5629.682598	8439.341331	812.4770397	326.7078909	6257926.174	4259659.878
1959.730324	1396.045697
3	5358.412977	8522.830297	967.7044858	420.9888243	6189762.401	3684682.244
3483.700887	1293.746943




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