projects / epclust.git / blame
| Commit | Line | Data |
|---|---|---|
| 5c652979 BA |
1 | toInteger <- function(x, condition) |
| 2 | { | |
| 3 | if (!is.integer(x)) | |
| 4 | tryCatch( | |
| 5 | {x = as.integer(x)[1]}, | |
| 6 | error = function(e) paste("cannot convert argument",substitute(x),"to integer") | |
| 7 | ) | |
| 8 | if (!condition(x)) | |
| 9 | stop(paste("argument",substitute(x),"does not verify condition",body(condition))) | |
| 10 | x | |
| 11 | } | |
| 12 | ||
| 0e2dce80 BA |
13 | curvesToCoeffs = function(series, wf) |
| 14 | { | |
| 15 | L = length(series[1,]) | |
| 16 | D = ceiling( log2(L) ) | |
| 17 | nb_sample_points = 2^D | |
| 18 | apply(series, 1, function(x) { | |
| 19 | interpolated_curve = spline(1:L, x, n=nb_sample_points)$y | |
| 20 | W = wavelets::dwt(interpolated_curve, filter=wf, D)@W | |
| 21 | rev( sapply( W, function(v) ( sqrt( sum(v^2) ) ) ) ) | |
| 22 | }) | |
| 23 | } | |
| 3eef8d3d BA |
24 | |
| 25 | #data: matrix of double or connection | |
| 26 | serialize = function(data, file, type, nb_per_chunk) | |
| 27 | { | |
| 28 | bin_data = file(file, "ab") | |
| 29 | #write data length on first call | |
| 30 | nbytes = ifelse(type=="double",8,4) | |
| 31 | first_write = FALSE | |
| 32 | if (file.info(file)$size == 0) | |
| 33 | { | |
| 34 | #number of items always on 8 bytes | |
| 35 | writeBin(0L, bin_data, size=8) #,endian="little") | |
| 36 | first_write = TRUE | |
| 37 | } | |
| 38 | if (is.matrix(data)) | |
| 39 | { | |
| 40 | writeBin(t(data), bin_data, size=nbytes) | |
| 41 | data_length = ncol(data) | |
| 42 | } | |
| 43 | else #if (is(data, "connection")) | |
| 44 | { | |
| 45 | if (first_write) | |
| 46 | { | |
| 47 | data_line = scan(data, double(), sep=",", nlines=1) | |
| 48 | writeBin(data_line, bin_data, size=nbytes) | |
| 49 | data_length = length(data_line) | |
| 50 | } | |
| 51 | repeat | |
| 52 | { | |
| 53 | data_chunk = scan(data, double(), sep=",", nlines=nb_per_chunk) | |
| 54 | if (length(data_chunk)==0) | |
| 55 | break | |
| 56 | writeBin(data_chunk, bin_data, size=nbytes) | |
| 57 | } | |
| 58 | } | |
| 59 | if (first_write) | |
| 60 | { | |
| 61 | #ecrire file_size-1 / (nbytes*nbWritten) en 0 dans bin_data ! ignored == file_size | |
| 62 | ignored = seek(bin_data, 0) | |
| 63 | writeBin(data_length, bin_data, size=8) | |
| 64 | } | |
| 65 | close(bin_data) | |
| 66 | } | |
| 67 | ||
| 68 | #TODO: read in binary file, always same structure | |
| 69 | getDataFromFile(indices, file, type) | |
| 70 | { | |
| 71 | bin_data = file(file, "rb") | |
| 72 | nbytes = ifelse(type=="double",8,4) | |
| 73 | data_length = readBin(bin_data,"double",1,nbytes) #,endian="little") | |
| 74 | t(sapply(indices, function(i) readBin(bin_data,"double",n=data_length,size=nbytes))) | |
| 75 | } |