Description Usage Arguments Details Value Examples
Convert observations stored in the array format into the data.frame format.
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array |
the array that should be converted into a data.frame. array or matrix. REQUIRED. |
coords |
the spatial coordinates of the observations contained in |
name_newparam |
the name of the contrast parameter to which cooresponds |
names_coords |
the name of the coordinates. character vector. |
na.rm |
should observations with missing values be removed ? logical. |
ARGUMENTS :
If coords
is set to NULL
, the coordinates will be defined by the position of the observations in array
.
If na.rm
is set to TRUE
, the coord
argument will only contains the coordinates of the non-NA observations of array
.
A dataframe
with in columns the coordinates and the parameter values, and in rows the observations.
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## load a NIFTI file (array format)
path.Pat1 <- system.file(file.path("nifti"), package = "MRIaggr")
nifti.Pat1_TTP_t0 <- readMRI(file.path(path.Pat1, "TTP_t0"), format = "nifti")
dim(nifti.Pat1_TTP_t0)
## conversion to data frame format
res128 <- array2dt(array = nifti.Pat1_TTP_t0, name_newparam = "TTP_t0")
dim(res128)
head(res128)
## conversion to data frame format with specific coordinates
res256 <- array2dt(array = nifti.Pat1_TTP_t0, name_newparam = "TTP_t0",
coords = expand.grid(129:206, 129:228, 1:3, 1))
dim(res256)
head(res256)
|
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