大约有 48,000 项符合查询结果（耗时：0.0794秒） [XML]
How to create a density plot in matplotlib?
...
124
Sven has shown how to use the class gaussian_kde from Scipy, but you will notice that it doesn...
Why does Lua have no “continue” statement?
...
11 Answers
11
Active
...
How do you downgrade rubygems?
I have rubygems 1.3.1 installed but I want to go back to 1.2.0. What's the command to downgrade rubygems?
6 Answers
...
What is the bower (and npm) version syntax?
...example: to indicate you'll take any subsequent patch-level changes on the 1.2.x tree, starting with 1.2.0, but less than 1.3.0, you could use:
"angular": "~1.2"
or:
"angular": "~1.2.0"
This also gets you the same results as using the .x syntax:
"angular": "1.2.x"
But, you can use the tilde...
How do you plot bar charts in gnuplot?
...
124
Simple bar graph:
set boxwidth 0.5
set style fill solid
plot "data.dat" using 1:3:xtic(2) w...
Replace all 0 values to NA
...
Replacing all zeroes to NA:
df[df == 0] <- NA
Explanation
1. It is not NULL what you should want to replace zeroes with. As it says in ?'NULL',
NULL represents the null object in R
which is unique and, I guess, can be seen as the most uninformative and empty object.1 Then it b...
Can you supply arguments to the map(&:method) syntax in Ruby?
...
141
You can create a simple patch on Symbol like this:
class Symbol
def with(*args, &block)...
How to use the 'sweep' function
...nd use in the operation defined by FUN.
For instance, if you want to add 1 to the 1st row, 2 to the 2nd, etc. of the matrix you defined, you will do:
sweep (M, 1, c(1: 4), "+")
I frankly did not understand the definition in the R documentation either, I just learned by looking up examples.
...
How does zip(*[iter(s)]*n) work in Python?
...
111
iter() is an iterator over a sequence. [x] * n produces a list containing n quantity of x, i.e...