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Pass a data.frame column name to a function
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109
You can just use the column name directly:
df <- data.frame(A=1:10, B=2:11, C=3:12)
fun1 &...
Behaviour of increment and decrement operators in Python
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1091
++ is not an operator. It is two + operators. The + operator is the identity operator, which ...
Is it safe to use -1 to set all bits to true?
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155
I recommend you to do it exactly as you have shown, since it is the most straight forward one....
Batch files - number of command line arguments
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105
Googling a bit gives you the following result from wikibooks:
set argC=0
for %%x in (%*) do S...
How do I iterate through each element in an n-dimensional matrix in MATLAB?
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You can use linear indexing to access each element.
for idx = 1:numel(array)
element = array(idx)
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end
This is useful if you don't need to know what i,j,k, you are at. However, if you don't need to know what index you are at, you are probably better off using arrayfun()
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SQL statement to select all rows from previous day
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Validating parameters to a Bash script
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Reverse colormap in matplotlib
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edited Nov 1 '14 at 5:13
answered Jul 19 '10 at 11:45
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