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python pandas: Remove duplicates by columns A, keeping the row with the highest value in column B
...]: df.drop_duplicates(subset='A', keep="last")
Out[10]:
A B
1 1 20
3 2 40
4 3 10
You can do also something like:
In [12]: df.groupby('A', group_keys=False).apply(lambda x: x.loc[x.B.idxmax()])
Out[12]:
A B
A
1 1 20
2 2 40
3 3 10
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vim deleting backward tricks
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answered Sep 3 '09 at 15:01
Lucas OmanLucas Oman
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How can we run a test method with multiple parameters in MSTest?
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edited Jul 28 at 21:13
Peter Mortensen
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Limit File Search Scope in Sublime Text 2
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Add and edit this in your ~/Library/Application Support/Sublime Text 2/Packages/User/Preferenc...
What is the purpose of the reader monad?
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Can I use a collection initializer for Dictionary entries?
... new Dictionary<int, string> {
{ 1, "Adam" },
{ 2, "Bart" },
{ 3, "Charlie" }
};
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Cluster analysis in R: determine the optimal number of clusters
...inity propagation (AP) clustering, see http://dx.doi.org/10.1126/science.1136800
library(apcluster)
d.apclus <- apcluster(negDistMat(r=2), d)
cat("affinity propogation optimal number of clusters:", length(d.apclus@clusters), "\n")
# 4
heatmap(d.apclus)
plot(d.apclus, d)
Six. Gap Statistic f...
MDI CDockablePane使用总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...;
DockPane(&m_Panes[1]);// BOTTOM
DockPane(&m_Panes[0]);// LEFT
（3）第三种情况
if (!m_Panes[0].Create(_T("Pane 0"), this, CRect(0, 0, 200, 100), TRUE, 1000,
WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN | CBRS_LEFT | CBRS_FLOAT_MULTI))
{return FALS...
Does Java casting introduce overhead? Why?
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edited Mar 23 '15 at 19:09
Dave Jarvis
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