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Reorder levels of a factor without changing order of values
... for manipulating factors and I'm finding it outrageously useful. Examples from the OP's data frame:
levels(df$letters)
# [1] "a" "b" "c" "d"
To reverse levels:
library(forcats)
fct_rev(df$letters) %>% levels
# [1] "d" "c" "b" "a"
To add more levels:
fct_expand(df$letters, "e") %>% leve...
How to send a command to all panes in tmux?
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this is bash, but can one do the same from the tmux command prompt, I mean by doing prefix + :
– Rho Phi
Apr 25 '16 at 17:15
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Reorder bars in geom_bar ggplot2
I am trying to make a bar-plot where the plot is ordered from the miRNA with the highest value to the miRNA with the lowest. Why does my code not work?
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How to get rid of the 'undeclared selector' warning
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Have a look at NSSelectorFromString.
SEL selector = NSSelectorFromString(@"setError:");
if ([self respondsToSelector:selector])
It will allow you to create a selector at runtime, instead of at compile time through the @selector keyword, and the co...
Linux error while loading shared libraries: cannot open shared object file: No such file or director
Program is part of the Xenomai test suite, cross-compiled from Linux PC into Linux+Xenomai ARM toolchain.
18 Answers
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Why does the C++ STL not provide any “tree” containers?
... general and involved enough to merit specialized tree classes independent from it. Also, the fact that std::map and std::set require a tree is, IMO, another argument for having an stl::red_black_tree etc. Finally, the std::map and std::set trees are balanced, an std::tree might not be.
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How do I install pip on macOS or OS X?
...t good for development. The version shipped with OS X may be
out of date from the official current Python release, which is
considered the stable production version. (source)
Homebrew is something of a package manager for OS X. Find more details on the Homebrew page. Once Homebrew is install...
T-SQL: Using a CASE in an UPDATE statement to update certain columns depending on a condition
...se dynamic SQL. This is, however, something I'd encourage you to stay away from. The solution above will almost certainly be sufficient for what you're after.
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HTML colspan in CSS
...e didn't fullfil our design requirement.
But if you don't need to benefit from the table-layout behaviour, then durilai's answer would suit you enough.
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Calc of max, or max of calc in CSS
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No you cannot. max() and min() have been dropped from CSS3 Values and Units. They may be re-introduced in CSS4 Values and Units however. There is currently no spec for them, and the calc() spec does not mention that either are valid inside a calc() function.
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