ArrayResample [array,{n1,n2,…}]
resamples array to have dimensions {n1,n2,…}.
ArrayResample [array,dspec]
resamples array according to the dimension specification dspec.
ArrayResample [array,dspec,scheme]
specifies resampling scheme, either point or bin based.
ArrayResample [array,dspec,scheme,{{xmin,xmax},…}]
resamples only the data in the specified subrange {{xmin,xmax},…}.
ArrayResample
ArrayResample [array,{n1,n2,…}]
resamples array to have dimensions {n1,n2,…}.
ArrayResample [array,dspec]
resamples array according to the dimension specification dspec.
ArrayResample [array,dspec,scheme]
specifies resampling scheme, either point or bin based.
ArrayResample [array,dspec,scheme,{{xmin,xmax},…}]
resamples only the data in the specified subrange {{xmin,xmax},…}.
Details and Options
- ArrayResample can be used for resampling data arrays based on a large selection of interpolation and approximation models.
- ArrayResample works with data arrays of any depth.
- The dimension specification dspec can be of the form:
-
n n samplesAll preserve dimensionAutomatic preserve dimension ratios{dspec1,…,dspeck} resample up to the ^(th) dimension
- For a multidimensional array, the notation n is taken to be equivalent to {n,Automatic ,…} and {n} equivalent to {n,All ,…}.
- The dimension ratios for an array of dimensions is taken to be .
- The scheme determines the location of sample and resample positions and can be of the form:
-
"Point" point sampling (default)"Bin" bin sampling{"Bin",alignment} bin sampling with specified alignment
- For input data of length n the "Point" resampling scheme assumes a data range from 1 to n and the "Bin" scheme assumes a data range from 0 to n with the alignment indicating the sample location within each bin.
- Bin alignment alignment can be Left , Center , Right or any number between (Left ) and 1 (Right ).
- The data range can be modified using the DataRange option.
- By default, the data is resampled on the entire data domain, ranging from 1 to for the "Point" scheme and from 0 to for the "Bin" scheme. Use the DataRange option to modify the coordinates of the data domain.
- With a subrange {{xmin,xmax},…} specified with respect to the DataRange , only the data values in the given interval are resampled. »
- The following options can be given:
-
- For possible settings for Padding , see the reference page for ArrayPad .
Examples
open all close allBasic Examples (2)
Subsample an array:
Downsample an array:
Resize a 2D array of data:
Scope (8)
Basic Uses (4)
Exact computation:
Precision of the input is preserved:
Resizing a symbolic array:
Resample a subdomain of the input signal:
Output Dimensions (1)
With size specified as a scalar, output dimension is selected such that dimension ratio is preserved:
Sampling Schemes (3)
By default, the "Point" sampling scheme is used:
Use the "Bin" scheme, which uses center alignment by default:
Specify the alignment of the bins:
Generate a "Point" resampling with three times the input resolution:
Compute the sampling positions:
Options (5)
Antialiasing (1)
When downsampling, by default no antialiasing is happening:
With antialiasing, all samples that fall in between new samples are averaged:
DataRange (1)
Padding (2)
The default padding value is "Fixed":
Specify a different padding:
By default, the same padding is used for all dimensions:
Use different paddings for different dimensions:
Resampling (1)
By default, "Linear" resampling is used:
Use a different resampling scheme:
"Nearest" resampling averages the samples if the sampling position is halfway between samples:
Use "NearestLeft" or "NearestRight" for a bias to left or right for half-integer sampling positions:
Applications (1)
Reduce the size of a dataset for faster visualization:
Properties & Relations (2)
Compare array resampling for a few different kernels:
Downsample can be used to downsample by an integer factor:
Possible Issues (1)
Exact computations are performed with integer data:
Apply N to integer data for faster computation:
Tech Notes
Text
Wolfram Research (2014), ArrayResample, Wolfram Language function, https://reference.wolfram.com/language/ref/ArrayResample.html (updated 2016).
CMS
Wolfram Language. 2014. "ArrayResample." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2016. https://reference.wolfram.com/language/ref/ArrayResample.html.
APA
Wolfram Language. (2014). ArrayResample. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/ArrayResample.html
BibTeX
@misc{reference.wolfram_2025_arrayresample, author="Wolfram Research", title="{ArrayResample}", year="2016", howpublished="\url{https://reference.wolfram.com/language/ref/ArrayResample.html}", note=[Accessed: 16-November-2025]}
BibLaTeX
@online{reference.wolfram_2025_arrayresample, organization={Wolfram Research}, title={ArrayResample}, year={2016}, url={https://reference.wolfram.com/language/ref/ArrayResample.html}, note=[Accessed: 16-November-2025]}