Pre-allocate memory

[sgibb]

As I already described in #4.

Here are some examples that could be improved by pre-allocating memory:

MALDIrppa/R/importSpectra.R

Lines 5 to 8 in 39adb98

	d <- list()
	for (i in 1:ncol(I)){
	d[[i]] <- createMassSpectrum(mz,I[,i])
	}

MALDIrppa/R/MSlist2.R

Lines 3 to 6 in 39adb98

	d <- list()
	for (i in 1:ncol(I)){
	d[[i]] <- createMassPeaks(mz,I[,i])
	}

MALDIrppa/R/MSlist.R

Lines 3 to 6 in 39adb98

	d <- list()
	for (i in 1:ncol(I)){
	d[[i]] <- createMassSpectrum(mz,I[,i])
	}

Already addressed by #4 :

MALDIrppa/R/deletePeaks.R

Lines 10 to 19 in 82cc263

	peaks2 <- list()
	for (i in 1:length(x)){
	t_int <- intensity(x[[i]])
	t_mas <- mass(x[[i]])
	mini <- which(t_int < min)
	t_int <- t_int[-mini]
	t_mas <- t_mas[-mini]
	peaks2[[i]] <- createMassPeaks(mass=t_mas,intensity=t_int)
	}

[Japal]

Done