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Select rows of a matrix that meet a condition
...me(). In that case the previous answers (using subset or m$three) will work, otherwise they will not.
To perform the operation on a matrix, you can define a column by name:
m[m[, "three"] == 11,]
Or by number:
m[m[,3] == 11,]
Note that if only one row matches, the result is an integer vector...
Tab Vs Space preferences in Vim
...nfluences the amount of whitespace to be inserted when you press the Tab key in insert mode. If expandtab is on, the tab key inserts softtabstop number of space characters. Whereas with expandtab switched off, pressing the Tab key inserts a the smallest possible number of tab+space charact...
sudo echo “something” >> /etc/privilegedFile doesn't work
This is a pretty simple question, at least it seems like it should be, about sudo permissions in Linux.
15 Answers
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How to group time by hour or by 10 minutes
like when I do
13 Answers
13
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Why does Node.js' fs.readFile() return a buffer instead of string?
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Tomáš Zato - Reinstate Monica
38.6k3737 gold badges171171 silver badges657657 bronze badges
answered Jun 23 '11 at 15:53
davindavin
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Understanding generators in Python
I am reading the Python cookbook at the moment and am currently looking at generators. I'm finding it hard to get my head round.
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How can I use speech recognition without the annoying dialog in android phones
... modification.
Can anybody give me some suggestions on how to do that?
Thanks!
4 Answers
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Access string.xml Resource File from Java Android Code
...R.array.planet);
for (int i = 0; i < arr.length; i++) {
Toast.makeText(getBaseContext(),arr[i], Toast.LENGTH_LONG).show();
}
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How to get multiple counts with one SQL query?
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Taryn♦Taryn
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Proper way to catch exception from JSON.parse
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i post something into an iframe then read back the contents of the iframe with json parse...so sometimes it's not a json string
Try this:
if(response) {
try {
a = JSON.parse(response);
} catch(e) {
alert(e); // error in the above string (in th...