Comparisons¶

LANG	Julia	R	Python	Others
padding zero on the left	`lpad(1, 3, '0')`		`f"{1:03}"`	`printf "%03d" 1` (Shell)
check if substring	`occursin()`		`in`
sum an array along row	`dims=1`	`margin=2`	`axis=0`
read image	`Images::load()`		`cv2.imread()` `skimage.io.imread()`	`imread()` (Matlab)
write image	`save()`		`cv2.imwrite()`
`sort` and `argsort`	`sort, sortperm`	`sort(), order()`	`sorted(), np.argsort()`
Jupyter kernels	`IJulia`	`IRkernel`	`ipykernel`
too many open figures	`inline`		`rcParams`
merge multiple slices	`vcat`		`np.r_`
index of true elements	`findall`	`which`	`np.where()[0]`
freq table	`StatsBase::countmap()`	`table`	`np.unique(return_counts=True)`
contingency table	`FreqTable::freqtable()`	`table`
figure size	`size in pixel`		`figsize in inch`
straight line	`Plots.abline!()`	`abline()`
get unique elements	`unique(x)`	`unique(x)`
index for unique elements	`unique(i->x[i], 1:length(x))`	`which(!duplicated(x))`
layout	`@layout`	`layout`
priority of `:`	`0.1+1:10-1 == (0.1+1):(10-1)`	`0.1+1:10-1 == 0.1+(1:10)-1`
enumerate	`for (k, v) in enumerate(d)`		`for k, v in enumerate(d):`
keep dims	`a[1:1,:]`	`a[1,,drop=FALSE]`	`a[0:1,:]`
expand dims			`a[:, None]` `np.expand_dims(a, axis=-1)` `a[:, np.newaxis]`
default color	`palette(:default)`		`plt.rcParams['axes.prop_cycle'].by_key()['color']`

Last update: June 26, 2023
Created: April 30, 2021

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