README.md

In dracodoc/mischelper: Collections Of Miscellaneous Helper Functions To Save Some Time

mischelper

RStudio Addin that collected several miscellaneous helper functions to save some time.

Used to be named formatpaste.

These functions are very simple in concept but may save you some time.

Updates

2022.02.28

Added a function to navigate File Pane to the folder of current file in editor, you can register the feature with keyboard shortcut if needed. If need to change directory in terminal, you can use File Pane menu Open new terminal here. If need to return to default project root, you can use File Pane menu Go to working diretory.

2021.03.15

Previously format console used R builtin clipboard support which only support windows/Mac. Per user request of linux support, this feature switched to clipr which has linux support. clipr is a required dependency package now.

2020.01.13

Addin will work on either selected text or current line.

2019.12.10

Removed some package depdencies so that the addin can be installed with minimal requirements, and only install needed packages when the feature requires it.

Sometimes I have some code commented out but want to run it from time to time. For example I often have some test code right after a function definition. This is used in interactive development so not really part of test framework. New feature will take selected commented out lines, remove comments and run in console.

2019.10.18

Running Shiny apps from RStudio will see current global environment, this has burned me more than once when my app runs fine in development, but failed after deployed because it was depending some global environment data implicitly. A shiny app should almost always run in clean session as it was supposed to be deployed. There is a issue here documented various similar requests so it is in popular need.

Since the issue has been around for some time and I want to use this as soon as possible, and the feature is easy enough to implement thanks to RStudio jobs and rstudioapi, I just implement it in mischelper. Now you can click a button in addin menu and launch your current Shiny app in background.

Some details about my design choices because my implementation is somewhat different from the methods described in other places: - One method is to retrieve the random port of launched app then open with RStudio viewer, this also need to translate url for RStudio server. I tried this method then I need to use a fixed port number which is not ideal (otherwise I'm not sure how can I retrieve the port number programmingly), and the app was opened in viewer pane not maximized, which is almost never the user want. - Instead I just launch the app with system browser, this solve all the problems. - I also put the app directory as job name to help your identify different jobs. - If you want the app to auto reload with source changes, you can use the global option options(shiny.autoreload = TRUE). - The job never use global environment, use the app dir as working directory, don't return result back to global environment.

2017.11.21

Sometimes I need to convert existing code into a package, then I need to find all external functions used in code, import package, and change the function usage into full qualified names. This is a cumbersome task. Previously I have to read code line by line, rely on error message of building package to find the functions.

In reading book Extending R I found XRtools::makeImports can scan a package and find all packages need to be imported. This doesn't fit my need exactly because I'm still developing a package, and I want all the external functions not packages. Still the source code helped me a lot to get my current solution: - With the mischelper addin menu Scan Externals, current selected code or current opened file will be scanned, and the result functions table returned. - Note the code or file must be able to be sourced properly to be checked, so you may need to load packages or prepare data before checking. - You can also use the exported function mischelper::scan_fun, mischelper::scan_file directly.

I have another addin namebrowser which could scan all installed packages and build a name table of all functions in them. So it's also possible to use that database and give all candidate packages for every external functions found. I'm not sure how many people will want to use that so I didn't do that yet. For now I need to verify each function usage anyway, and with the packages properly loaded, pressing F1 should tell me the proper package already. If I scan all installed packages, the database may actually give more false positives and make it harder to determine which is the right one.

2017.06.27

printc will generate the literal c("a", "b") format from the vector c("a", "b"). For example I want to rename some columns but I don't want to rely on number index which can break later, so I just use printc(names(mtcars)[1:3]) then copy the result to code.

2017.06.21

The RStudio Environment pane variable name column is too narrow for longnames, so it's difficutl to find the right data frame in long list of similar names. Before RStudio make that column adjustable or use shorter summary description columns, you can select the variable and use view data frame to open in data viewer.

You can also select an expression (or part of an expression) and use this shortcut to inspect the content. This way you don't need to save it into a temporary variable. It's a great way to quickly explore expressions, and I have found I'm using it many time everyday.

You can assign a keyboard shortcut for it using the toolbar menu Addins -> Browse addins -> keyboard shortcuts.

2017.04.10

Added a feature that will read csv format data in clipboard, convert to data frame and open Viewer in RStudio, write markdown table format back to clipboard so you can use it in markdown document. The dataframe itself is also returned.

2017.04.06

I just found RStudio have the built-in menu profvis selected lines which is same with my provis feature. It can be accessed from the Profile menu, a wizard toolbar button (which is only available in .R file, not in .Rmd) or keyboard shortcut shift-alt-cmd-P in Mac.

Thus I removed the same feature in my addin, added another feature I found useful: Render RMarkdown.

When you knit a .Rmd document, all code are evaluated from fresh, independent from the global environment. This follows the reproducible research principles.

If I do need a strict reproducible report I will knit the complete report, however sometimes I just want a rendered html with some results and plots, and I don't want to run some computational expensive operations again from beginning, like reading a huge dataset from disk and go through every previous step.

rmarkdown::render("your_report.Rmd") will render the document in the global environment, so if you have the data/object exists already it can get the result immedidately. I found this can save a lot of time for me, especially sometimes I need to render several times in editing.

2017.02.01

I use str() a lot to inspect lists or objects. In RStudio you can expand a list/object in environment pane which is just str() output, however the space is often too limited to get an overview. If running str() in console, it could also need quite some scrolling.

At first I tried to convert str() output into a nested list and view it with listviewer. However I didn't find a good way to show some meta info of an item, which should be at same level of item and attached to the item.

Then I just parse the output and tag each line with tags, generate an html file then styling it with css. To use the feature just select the list/obj in RStudio source editor or console, click addin menu Misc - View str(). Or you can call function directly with mischelper::render_str().

The css styling can be customized easily. Use chrome/firefox developer tool to inspect the opened page, select the item and edit the cooresponding css, and you can see result immediately. Once you are satisfied with the changes, save the change to css in package, which is located in system.file("css", "str_render.css", package = "mischelper").

The info label and the name of input object are added for clarity. Since they are not part of original str() output, () are used to separate them.

Note this only works for list，data frame or objects that have some nested structure. It doesn't work for simple vectors, but there is not much need of a html view for the simple structure anyway.

2017.01.29

Added feature to call listviewer for selected list or object. The listviewer package itself registered an addin menu but I don't like it to be a modal dialog blocking R session, and I don't want to enable the edit mode. I think edit to list should be done in program so it can be tracked.

Just select the list or object then click addin menu or assign a keyboard shortcut.

2017.01.24 Added mac os clipboard functions. Now the package should work in both windows and mac. The functions are also available for use if you want. Check ?mischelper::clip_read_lines, ?mischelper::clip_write_lines for more details. Update: the functions cannot read all lines in mac. Please use clipr package instead.

2017.01.19 Added a simple timing menu which is just one time run microbenchmark

2016.09.17 Used expression name instead of full expression in microbenchmark printout

2016.09.09 Added feature to format console input and output

Installation

To install: Install RStudio newest release or preview version. (Version 0.99.903 has a bug to run microbenchmark 3 times. Newer preview version don't have this bug.) Run following lines in RStudio console:

    install.packages("devtools")
    devtools::install_github("dracodoc/mischelper")

The packages stringr, stringi, magrittr, microbenchmark, profvis will be installed if not already available. microbenchmark is only required for benchmark function, and profvis is only for profvis but I chose to install them automatically because they are small packages without much dependencies.

Functions can be accessed from the drop down list in Addin toolbar button or with keyboard shortcuts. All functions are prefixed with Misc.

If you feel you don't need all the functions and they take too much space in the Addin drop down list, you can prevent some to be registered by RStudio. - edit the control file by file.edit(system.file("rstudio", "addins.dcf", package = "mischelper")) - remove the sections you don't need. - restart R session. - You can always restore to default by installing the package again if there is something wrong with the edit.

Keyboard shortcuts

You can assign keyboard shortcut to functions: Select Browse Addins from the Addin toolbar button. Click Keyboard Shortcuts in left bottom. * Click the Shortcut column for each row to assign keyboard shortcut.

benchmark selected code

• Misc - microbenchmark

Select code to be benchmarked, use keyboard shortcut or toolbar menu. The code will be benchmarked for 10 runs in console. microbenchmark() parameters can be changed by recalling history in console then editing the last line. Since the source code is not changed, you can continue to edit the code, select different code sections to benchmark, continue working on code without needing to remove bechmark code when you are done with benchmark.

• Misc - profvis

Similar to microbenchmark, using profvis to visualize profiling result.

Currently the source editor window must be in focus before calling function, i.e. if you selected some code in source editor but moved focus to console before calling function, the addin will not work. There is a getSourceEditorContext() function in rstudioapi to solve this, but it is only available after RStudio version 0.99.1111, which is only available as preview version. I plan to move to this function in future.

Helper with clipboard

Copy text into clipboard, put cursor to desired position. Each function will insert formated text to current cursor position. This works in both source editor and console.

Misc - Format console input and output

It's very common to find R code examples copied directly from console, which have format like this:

> x <- 3
> switch(x, 2+2, mean(1:10), rnorm(5))
[1]  2.2903605  2.3271663 -0.7060073  1.3622045 -0.2892720


> centre <- function(x, type) {
+ switch(type,
+        mean = mean(x),
+        median = median(x),
+        trimmed = mean(x, trim = .1))
+ }
> x <- rcauchy(10)
> centre(x, "mean")
[1] 0.8760325

To run these examples as script, lots of manual edits are needed. Now you can copy them either from some documents or your console, click addin menu Misc - Format console, the formated script will be inserted to current cursor position, and written back to clipboard so you can paste to other applications:

x <- 3
switch(x, 2+2, mean(1:10), rnorm(5))
# [1]  2.2903605  2.3271663 -0.7060073  1.3622045 -0.2892720


centre <- function(x, type) {
  switch(type,
         mean = mean(x),
         median = median(x),
         trimmed = mean(x, trim = .1))
  }
x <- rcauchy(10)
centre(x, "mean")
# [1] 0.8760325

The formatR package have a related feature, though it will only evaluate valid script and put results in comments.

Misc - Unwrap text

Remove unneeded hard line breaks of text in clipboard, then paste into current cursor position.

Misc - Unwrap with blank

Remove hard line breaks, add add extra blank line between paragraphs, then paste into the cursor position.

Misc - Flip windows path

Convert "\" in clipboard to "/", then paste into current cursor position. Thus windows path can be used in R.

dracodoc/mischelper documentation built on March 25, 2022, 4:38 a.m.