Additional matrix functionality for R including: (1) wrappers for the base matrix function that allow matrices to be created from character strings and lists (the former is especially useful for creating block matrices), (2) better printing of large matrices via the generic "pretty" print function, and (3) a number of convenience functions for users more familiar with other scientific languages like 'Julia', 'Matlab'/'Octave', or 'Python'+'NumPy'.
Package ramify provides additional matrix functionality for R including: (1) wrappers for the base matrix function that allows matrices to be created from character strings and lists (the former is especially useful for creating block matrices), (ii) better default printing of large matrices, and (iii) a number of convenience functions for users more familiar with other scientific languages like Julia, MATLAB/Octave, or Python.
The main function in this package is mat, an extention to the built-in matrix function. Many convenience functions are also available, for example:
bmat - like mat, but constructs a block matrix.dmat - like mat, but returns a data frame instead of a matrix.argmax/argmin - find the position of the max/min in each row or column of a matrixeye - construct an identity matrixhcat/vcat - concatenate matricesfill - fill a matrix or array with a particular valueflatten - flatten (i.e., collapse) a matrix or array to one dimensioninv - calculate the inverse of a square matrixlinspace/logspace - construct a vector of linearly-spaced/logarithmically-spaced elementsmeshgrid - construct matrices for evaluating functions over rectangular 2-D grids (useful for contour plots)ones/zeros - construct a matrix or array of all ones/zerosrand/randi/randn - construct a matrix or array of uniformly/normally distributed random numbersresize - change the size and shape of a given matrix or arraysize - extract the dimensions of a matrix or array.trues/falses - construct a matrix or array of all TRUEs/FALSEsramify introduces a pretty print function called pprint. This is a generic function. Ordinarily, matrices are printed completely on the screen which is not very helpful when the dimensions are large. Using the pprint function, however, allows you to see a more efficient printed version of the matrix. For example,
> m <- randn(1000, 1000) # matrix filled with a million normal random deviates> pprint(m) # compare this output to `print(m)` and `head(m)`# # [,1] [,2] [,3] ... [,1000]# [1,] 0.0385 -0.0620 -0.0930 ... 1.9295# [2,] -2.5014 0.3277 1.1657 ... -0.6824# [3,] -0.1308 -0.9673 0.6388 ... -0.2852# ... ... ... ... ... ...# [1000,] 0.4980 0.6902 1.4920 ... -2.7023
This can be useful for viewing large (numeric) data frames too:
> data(Boston, package = "MASS") # Boston housing data> pprint(Boston)# 506 by 14 matrix of doubles # # crim zn indus ... medv# 1 0.0063 18.0000 2.3100 ... 24.0000# 2 0.0273 0.0000 7.0700 ... 21.6000# 3 0.0273 0.0000 7.0700 ... 34.7000# ... ... ... ... ... ...# 506 0.0474 0.0000 11.9300 ... 11.9000
This printing behavior was partially inspired by the "tbl_df" class for data frames provided by the dplyr package.
You can install the latest stable release from CRAN:
install.packages("ramify")
The development version is hosted on GitHub at https://github.com/bgreenwell/ramify and can be downloaded using devtools:
# Assuming devtools is already installeddevtools::install_github("bgreenwell/ramify")
Bug reports should be submitted to https://github.com/bgreenwell/ramify/issues.
NEWS for ramify package
clip and repmat.pprint is now much faster for large matrices and data frames.mat.character is now a few times faster for numeric matrices.base package from Depends."mat" class in function documentation.atleast_2d.resize did not work correctly for matrices.stats packages to Depends.stats package."mat" class in favor of a generic pprint function.at_least2d option to many functions for base R compatibility.pprint and others.tri, tril, triu, etc. for constructing triangular functions.meshgrid for MATLAB and Python+NumPy compatibility."mat" class when extracting or replacing parts.argmax, argmin, and randi."mat" introduced for better printing of large matrices."mat" matrices.