wt | small language that serves as a sample to parslet
kandi X-RAY | wt Summary
kandi X-RAY | wt Summary
A small language that will eventually compile to C.
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wt Examples and Code Snippets
Lines of Code : 56License : Permissive (MIT License)
Copydef knapsack_with_example_solution(W: int, wt: list, val: list):
"""
Solves the integer weights knapsack problem returns one of
the several possible optimal subsets.
Parameters
---------
W: int, the total maximum weight for def _construct_solution(dp: list, wt: list, i: int, j: int, optimal_set: set):
"""
Recursively reconstructs one of the optimal subsets given
a filled DP table and the vector of weights
Parameters
---------
dp: list of list, def get_cluster(nodes):
"""
Returns cluster
format cluster:{WT(bitcode):nodes with same WT}
"""
cluster = {}
for key, value in nodes.items():
cluster.setdefault(key.count("1"), {})[key] = value
return cluster Community Discussions
Trending Discussions on wt
QUESTION
I use the mtcars dataframe and I use the following code to assign NA to all the values of columns drat and wt <=3.
ANSWER
Answered 2022-Mar-31 at 16:11We may use if_any on the columns that are changed to NA to return a logical vector to replace values in 'qsec'
QUESTION
We have a very large table with a total number of rows around ~4 billion and everyday throughput is around ~20-25 million.
Below is the Sample Table definition.
...ANSWER
Answered 2022-Mar-10 at 16:14CREATE INDEX table_name_desc_index ON table_name (userid,_date DESC NULLS LAST);
QUESTION
I want to position a legend (common to all plots) in a blank space in a patchwork layout. From what I can find online I cannot manually position a legend using legend.position if I also use guides="collect" (but can use left, right etc.).
I have tried to use l <- get.legend and then + inset_element(l, 0.6, 0.6, 1, 1) however it doesn't understand l. I also tried mixing in + inset_element(gridExtra::tableGrob(l)) without luck.
My goal is to place the legend in the blank space. My actual patchwork plot is more complicated but has two blank spaces I want the legend to sit in.
MWE
...ANSWER
Answered 2022-Mar-08 at 04:58Alter your design object to include a fourth element and use guide_area() to place the guide.
QUESTION
I'm having issues understanding how the veganCovEllipse() function from the vegan package v 2.5-7 calculates an ellipse.
...ANSWER
Answered 2022-Feb-12 at 07:53veganCovEllipse is not an exported function. This means that it is not intended for interactive use, but it is a support function only to be called from other functions in vegan. Therefore it is not documented. However, the answer is simple: it can calculate any kind of ellipse depending on the input. In vegan the function is called for instance from ordiellipse and there it can draw standard error ellipses, "confidence" ellipses (standard error multiplied by some value picked from statistical distribution), standard deviation ellipses, standard deviation ellipses multiplied by similar constants as standard errors, or enclosing ellipses that contain all points of a group, depending on the input to the function. In showvarparts function it is just re-used to draw circles. Actually veganCovEllipse does not fit anything: it just calculates the coordinates to draw what you asked it to draw, and your input defines the shape, size, orientation and location of the ellipse coordinates.
There are other functions in other packages that do the same: return you the points needed to plot an ellipse from your input data. For instance, the standard (recommended) package cluster makes similar calculations in non-exported functions cluster:::ellipsoidPoints with effectively the same mathematics, but in completely different way. This function is non-exported as well, and it is intended to be called from user function cluster::predict.ellipsoid. The vegan implementation is similar as in the ellipse function in the car package, where these calculations are embedded in that function and cannot be called separately from car::ellipse.
QUESTION
I am looking for a way to construct a function that will allow the user, given a data frame, to:
- Choose what variable will be the dependent variable;
- Choose a certain control (one only variable);
- Based on these choices, run several different regressions;
Ideally, I would like something like this:
...ANSWER
Answered 2022-Jan-15 at 00:45You should work with string substitution. The snippet below provides a simple overview of how you could adjust your function. It would also be good practice to pass the dataset df as an additional parameter in your function.
QUESTION
I've built this new ggplot2 geom layer I'm calling geom_triangles (see https://github.com/ctesta01/ggtriangles/) that plots isosceles triangles given aesthetics including x, y, z where z is the height of the triangle and
the base of the isosceles triangle has midpoint (x,y) on the graph.
What I want is for the geom_triangles() layer to automatically provide legend components for the height and width of the triangles, but I am not sure how to do that.
I understand based on this reference that I may need to adjust the draw_key argument in the ggproto StatTriangles object, but I'm not sure how I would do that and can't seem to find examples online of how to do it. I've been looking at the source code in ggplot2 for the draw_key functions, but I'm not sure how I would introduce multiple legend components (one for each of height and width) in a single draw_key argument in the StatTriangles ggproto.
ANSWER
Answered 2022-Jan-30 at 18:08I think you might be slightly overcomplicating things. Ideally, you'd just want a single key drawing method for the whole layer. However, because you're using a Stat to do the majority of calculations, this becomes hairy to implement. In my answer, I'm avoiding this.
Let's say I'd want to use a geom-only implementation of such a layer. I can make the following (simplified) class/constructor pair. Below, I haven't bothered width_scale or height_scale parameters, just for simplicity.
QUESTION
I'm trying to pivot to a longer format using dplyr::pivot_longer, but can't seem to get it to do what I want. I can manage with reshape::melt, but I'd also like to be able to achieve the same using pivot_longer.
The data I'm trying to reformat is a correlation matrix of the mtcars-dataset:
...ANSWER
Answered 2022-Jan-12 at 14:31Does this achieve the behavior you need?
QUESTION
I am trying to select a theme from ggplot2 based on some string given. For demo purposes, consider the following code:
ANSWER
Answered 2021-Dec-19 at 19:45We may use getFunction
QUESTION
I'm trying to run a simple single linear regression over a large number of variables, grouped according to another variable. Using the mtcars dataset as an example, I'd like to run a separate linear regression between mpg and each other variable (mpg ~ disp, mpg ~ hp, etc.), grouped by another variable (for example, cyl).
Running lm over each variable independently can easily be done using purrr::map (modified from this great tutorial - https://sebastiansauer.github.io/EDIT-multiple_lm_purrr_EDIT/):
...ANSWER
Answered 2021-Dec-12 at 22:18IIUC, you can use group_by and group_modify, with a map inside that iterates over predictors.
If you can isolate your predictor variables in advance, it'll make it easier, as with ivs in this solution.
QUESTION
I'm trying to edit the names of the factor levels of a predictor variable in R for an effect plot with the jtools package. I should be able to do this with the "pred.labels" argument, but the labels don't change. For example, using the mtcars data set I try to write out the predictor names ("four", "six", "eight") but there is no change in the figure.
...ANSWER
Answered 2021-Nov-29 at 21:04Since jtools seems to use ggplot2 you can just change the labels like you would if you were using ggplot2
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On a UNIX-like operating system, using your system’s package manager is easiest. However, the packaged Ruby version may not be the newest one. There is also an installer for Windows. Managers help you to switch between multiple Ruby versions on your system. Installers can be used to install a specific or multiple Ruby versions. Please refer ruby-lang.org for more information.
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