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r - Store values in For Loop
    I have a for loop in R in which I want to store the result of each calculation (for all the values looped ... array of the data or something? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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r - faceted piechart with ggplot2
    I've done a faceted piechart with ggplot2 like this: qplot(x=factor(1), data=mtcars, fill=factor(cyl)) + ... full circles for all the piecharts? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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r - weighted means by group and column
    I wish to obtain weighted means by group for each of several (actually about 60) columns. This question is very ... 100.0000 100.0000 10.0000 See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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r - Why is vectorization faster
    I've been learning R for a while now, and have come across a lot of advice to programming types like myself ... than for loops in MATLAB?) See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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308 views
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r - How can I automatically create n lags in a timeseries?
    I have a dataframe with a column t. I want to create n lagged columns that has names like t-1,t-2 etc.. ... ) The column to be lagged is OBS_Q. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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579 views
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r - How to add overlapping histograms with lattice
    Using the data in this question https://stackoverflow.com/questions/21663108/coloring-points-on-a-lattice-plot-in-r ... is the horizontal axis? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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386 views
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r - Send a text string containing double quotes to function
    I'm having a problem with using double quotes while formatting text strings being sent to functions in R. ... of different number of arguments. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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558 views
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r - multiple ggplot linear regression lines
    I am plotting the occurrence of a species according to numerous variables on the same plot. There are many other ... any help on this? Cheers See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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r - trouble installing and loading rJava on mac El Capitan
    Have issue installing rJava, tried most troubleshooting steps here and doesn't work. It's returning error Loading ... installed but won't load See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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364 views
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r - Merge multiple data frames - Error in match.names(clabs, names(xi)) : names do not match previous names
    I'm getting some really bizarre stuff while trying to merge multiple data frames. Help! I need to merge a bunch ... ideas on how to merge? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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476 views
1 answer
r - Quantmod, getSymbols error trying to replicate answer
    I just downloaded the package Quantmod and have been playing with getSymbols. I want to be able to get data for ... lattice_0.20-23 tools_3.0.2 See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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364 views
1 answer
r - Create a variable capturing the most frequent occurence by group
    Define: df1 <-data.frame( id=c(rep(1,3),rep(2,3)), v1=as.character(c("a","b","b",rep("c",3))) ) s.t. > df1 id ... b b 4 2 c c 5 2 c c 6 2 c c See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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391 views
1 answer
r - Dynamic arguments to expand.grid
    I am using expand.grid to generate all of the pairs of the elements of a vector, such as: v <- 1:3 expand.grid(v, ... of expand.grid(v,v,v,v,v)? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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r - append list to a list
    I know this is a really noob question, but how do I append a list of dataframes to a dataframe to form a new list, with ... 1 2 2 3 3 4 4 5 5 See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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553 views
1 answer
r - use csl-file for pdf-output in bookdown
    I would like to use a .csl-file for formatting references with bookdown. Adding csl: some-style.csl to index. ... ): PDF output (incorrect): See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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302 views
1 answer
r - changing multiple column values given a condition in dplyr
    I'm looking to find a simple way to do something like the following but with dplyr, essentially just replacing the ... 1, NA, x3)) Thanks! See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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450 views
1 answer
r - How to build a crossword-like plot for a boolean matrix
    I have a boolean matrix: mm <- structure(c(TRUE, TRUE, TRUE, FALSE, TRUE, FALSE, TRUE, FALSE, FALSE, ... the same colors. Any ideas are welcome See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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497 views
1 answer
r - Select last row by group for all columns data.table
    I was surprised doing the following: R) system.time(lastOrder <- order[,lapply(.SD,tail,1),by="TRADER_ID, ... to select last rows by group See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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653 views
1 answer
r - Pass a c++ object as a pointer an reuse in another function in Rcpp
    Suppose a I have the following 2 functions in C++: // [[Rcpp::export]] SEXP foo() { int a = 1; Rcpp::XPtr ... instead of 0. How can I fix this? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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484 views
1 answer
r - How to remove NA data in only one columns?
    I have a file that looks like so: date A B 2014-01-01 2 3 2014-01-02 5 NA 2014-01-03 NA NA 2014- ... should not matter. How can I achieve that? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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710 views
1 answer
r - How to add abline with lattice xyplot function?
    I am trying to plot two variables: Eeff vs Neff using xyplot function of lattice package. I would like to know ... = "Nitrogen efficiency (%)") See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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556 views
1 answer
r - Plot Regression Surface
    I am reading a book by Cohen, Cohen, Aiken and West(2003) "Applied Multiple Regression Correlation Analysis ... and non-zero-length coordinates See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
0 votes
366 views
1 answer
r - How to multiply a single column in a data.frame by a number
    I would like to know how to muliply a single column by 5 from a txt file that I used a script to read. I ... .table(file="tst1.txt",header=TRUE) See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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507 views
1 answer
r - Margin adjustments when using ggplot's geom_tile()
    From the documentation for ggplot2's geom_tile() function, we have the following simple plot: # Generate data pp ... to change the margin size. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
0 votes
360 views
1 answer
r - Filter groups in dplyr that exclusively contain specific combinations of values
    Given a table like: id value 1 1 a 2 2 a 3 2 b 4 2 c 5 3 c I would like to filter for: a) the ids that only have ... "a", "a", "b", "c", "c")) See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
0 votes
401 views
1 answer
r - How to filter on partial match using sparklyr
    I'm new to sparklyr (but familiar with spark and pyspark), and I've got a really basic question. I'm ... 'project_eftpos_failure'.; line 5 pos 7 See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
0 votes
919 views
1 answer
r - reduce space between grid.arrange plots
    I asked a question HERE about grid arrange and got a terrific response. I want to reduce the space between ... out of bounds (unit subsetting) See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
0 votes
442 views
1 answer
r - How to display strip labels below the plot when faceting?
    It seems that the strips are always above the plot created by ggplot2. Can they be moved below the plot? For ... be displayed be at the bottom? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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