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#' This function determines the 4 parameter log fit constants for the two conditions in a replicate
#' @param Median The median fold change abundance from each temperature
#' @param Data_Norm_Omit List of accession numbers with NA omitted
#' @param Condition The Condition or the Control depending on which data set is being analyzed
#' @param Temperature The temperatures from the heat treatment
#' @importFrom stats nls
#' @return normalized data to the Inflect program
FPLFit_Correction<-function(Median,Data_Norm_Omit,Condition,Temperature){
TotalCellsPer<-as.numeric(NROW(Data_Norm_Omit)*NCOL(Data_Norm_Omit))
TotalRowsPer<-as.numeric(NROW(Data_Norm_Omit))
TotalColsPer<-as.numeric(NCOL(Data_Norm_Omit))
df <- data.frame(Temperature, Median)
minmelt <- function(data, param) {with(data, sum(((param[3]+((param[4]-param[3])/(1+exp(-param[1]*(data[1]-param[2])))))-data[2])^2))
}
CurveFitCorrection <- optim(par = c(-1,mean(Temperature),min(Median),max(Median)), fn = minmelt, data = df, method=c('L-BFGS-B'))
CCurvea1<-CurveFitCorrection$par
CCurvea<-CCurvea1[1]
CCurveb<-CCurvea1[2]
CCurvec<-CCurvea1[3]
CCurved<-CCurvea1[4]
PredictedNormal <- CCurvec+ (CCurved-CCurvec)/(1+(exp(-CCurvea*(Temperature-CCurveb))))
Correction<-((100-((Median-PredictedNormal)/(Median)*100))/100)
i <- 1
NormBothCorrect = matrix(NA, nrow=TotalRowsPer, ncol=TotalColsPer)
repeat{
j<-1
repeat{
NormBothCorrect[i,j]<-Data_Norm_Omit[i,j]*Correction[j]
j <- j+1
if (j > TotalColsPer){
break
}
}
i<-i+1
if (i > TotalRowsPer){
break
}
}
return(NormBothCorrect)
}
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