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# Load Data | |
grainData <- read.csv('grainSize.csv', check.names=F, na.strings='--' ) | |
# Calculate Derived Sample Values | |
grainData[['Phi Diameter']] <- -log2( grainData[['Grain Diameter']] ) | |
totalWeight <- sum( grainData[['Sample Weight']] ) | |
grainData[["Percent Retained"]] <- grainData[['Sample Weight']] / totalWeight | |
grainData[["Cumulative Percent"]] <- cumsum( grainData[["Percent Retained"]] ) | |
grainData[['Percent Finer']] <- 1 - grainData[['Cumulative Percent']] |
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