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usually import Excel data in CVS format A new package in CRAN facilitates reading in entire Excel workbook and selecting worksheets and cells from there. example.... **The Pith of Performance**, and kindly contributed to R-bloggers)

require(XLConnect)

# Load Excel workbook into memory

wb <- loadWorkbook("~/Desktop/R XLConnect/82scaling.xlsx", create = FALSE)

# Convert a sheet to a data frame

df <- readWorksheet(wb,

sheet = "SGI-NUMA",

startRow = 3,

endRow = 15,

startCol = which(LETTERS=="A"),

endCol = which(LETTERS=="P")

)

print(df)

# Measured KRays.Sec RelCap Efficiency Inverse Fit Transform Trendline Parameters

#1 CPU (p) X(p) C=X(p)/X(1) C/p p/C p-1 (p/C)-1 Quadratic Coefficients

#2 1 20 1.00 1.00 1.00 0 0.00 a 5.0000E-06

#3 4 78 3.90 0.98 1.03 3 0.03 b 0.0500

#4 8 130 6.50 0.81 1.23 7 0.23 c 0.0000

# ...

To

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