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Modifying a subset of rows in a pandas dataframe
...und that accessing everything in one operation (rather than [one][two]) is more likely to work for setting.
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Cluster analysis in R: determine the optimal number of clusters
...net/advstats/cluster.html & http://www.mattpeeples.net/kmeans.html for more. The location of the elbow in the resulting plot suggests a suitable number of clusters for the kmeans:
mydata <- d
wss <- (nrow(mydata)-1)*sum(apply(mydata,2,var))
for (i in 2:15) wss[i] <- sum(kmeans(mydata...
Switch statement for greater-than/less-than
...search. I don't know if it is my implementation or if the linear search is more optimized. It could also be that the keyspace is to small.
values=[0, 1000, 2000 ... 29000, 30000];
while(range) {
range = Math.floor( (smax - smin) / 2 );
sidx = smin + range;
if ( val < values[sidx] ) { sm...
Add a UIView above all, even the navigation bar
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Bootstrap dropdown sub menu missing
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Android: Share plain text using intent (to all messaging apps)
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Google Authenticator available as a public service?
... random, numbers the server expects.
A secure one time password system is more sophisticated than a random number generator, but the concept is similar. There are also other details to help keep the device and server in sync.
So, there's no need for someone else to host the authentication, like, s...
Skip download if files exist in wget?
...loading ~1600 files from a list, and then updated the list to include some more files. The files don't change so I don't care about the latest version and I don't want it to check the server for new versions of the 1600 files that I already have.
– JBentley
Oct...
What is the equivalent of 'describe table' in SQL Server?
...mous terminal widths. The solutions utilizing select found below are much more appropriate for sqlcmd users.
– ctpenrose
Aug 15 '17 at 16:42
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