linear-regression | PHP package for computation of simple linear regression | Testing library

 by   mnshankar PHP Version: Current License: MIT

kandi X-RAY | linear-regression Summary

kandi X-RAY | linear-regression Summary

linear-regression is a PHP library typically used in Testing applications. linear-regression has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

PHP package for computation of simple linear regression parameters
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              linear-regression has a low active ecosystem.
              It has 19 star(s) with 10 fork(s). There are 5 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              There are 2 open issues and 1 have been closed. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of linear-regression is current.

            kandi-Quality Quality

              linear-regression has 0 bugs and 0 code smells.

            kandi-Security Security

              linear-regression has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              linear-regression code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              linear-regression is licensed under the MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              linear-regression releases are not available. You will need to build from source code and install.
              Installation instructions, examples and code snippets are available.
              linear-regression saves you 292 person hours of effort in developing the same functionality from scratch.
              It has 705 lines of code, 58 functions and 5 files.
              It has high code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed linear-regression and discovered the below as its top functions. This is intended to give you an instant insight into linear-regression implemented functionality, and help decide if they suit your requirements.
            • Compute the regression coefficient
            • Load a CSV file .
            • Return the determinant of the matrix
            • Compute the inverse of this matrix .
            • Multiplies this matrix with another matrix .
            • Calculate the sub - matrix
            • Calculate the student s p value
            • Multiplies this matrix by a scalar .
            • Compute a stat matrix
            • Extract x array from raw data
            Get all kandi verified functions for this library.

            linear-regression Key Features

            No Key Features are available at this moment for linear-regression.

            linear-regression Examples and Code Snippets

            No Code Snippets are available at this moment for linear-regression.

            Community Discussions

            QUESTION

            fitting a gamma variate curve to a set of data points in c++
            Asked 2021-May-09 at 17:14

            I have an array of values (concentration values), with each value taken at a different time point. I need to fit a gamma-variate curve (formula is in the picture below) to these values (i.e. find alpha and beta such that the curve best fits those points - all other variables are known.)

            an example of the values i might get (crosses), and the curve I'd want to fit:

            I have no idea how to do this. I tried to fit a simplified version of the formula, one that can be solved by using linear regression, by using matrices but I couldn't get it to work. That version of the formula (in which you only solve for one variable, alpha) looks like this:

            simplified version, which would also be fine:

            my attempt to solve fit the linear regression curve using matrices, using the vnl library (https://vxl.github.io/doc/release/core/vnl/html/index.html) looked like this. I was following this guy's tutorial (https://machinelearningmastery.com/solve-linear-regression-using-linear-algebra/)

            ...

            ANSWER

            Answered 2021-May-09 at 17:14

            This is a problem which is not best suitable to solving by ITK. While you could use ITK's Optimizer infrastructure, there are better/simpler choices.

            Maybe try NLOpt? Here is an example of how to use it. Also, you could look at this code which fits a polynomial to points in 3D space.

            Source https://stackoverflow.com/questions/67458829

            QUESTION

            How to use numpy dataset in Pytorch Lightning
            Asked 2021-May-08 at 13:13

            I want to make a dataset using NumPy and then want to train and test a simple model like 'linear, or logistic`.

            I am trying to learn Pytorch Lightning. I have found a tutorial that we can use the NumPy dataset and can use uniform distribution here. As a newcomer, I am not getting the full idea, how can I do that!

            My code is given below

            ...

            ANSWER

            Answered 2021-May-07 at 16:25

            This code will return you label as y and a,b as 2 features of 500 random examples merged into X.

            Source https://stackoverflow.com/questions/67437448

            QUESTION

            Multiple Linear Regression with TensorFlow
            Asked 2021-Apr-14 at 21:44

            I'm trying to perform a Multiple Linear Regression with TensorFlow and confront the results with statsmodels library.

            I generated two random variables X1 and X2 (so that anyone can reproduce it) that will explain the Y variable. The X2 variable is completely useless for this regression, it's just noise with a big scale so that the coefficient will result not significant (p-val close to 1). At the end I should obtain a model that is basically. y_data = alpha + (0.25)x1 + (0.00)x2 + error.

            I tried to adapt this code to my randomly generated data, but unfortunately, this is not working at all. This below is my try:

            ...

            ANSWER

            Answered 2021-Apr-14 at 21:44

            The key issues with your code are the following:

            1. While it is necessary to add a column of ones to the features matrix x_data before running the regression with statsmodels, this is not necessary when running the regression with tensorflow. This means that you are passing 3 features to tensorflow instead of 2, where the additional feature (the first column of x_data) is constant.
            2. You are normalizing x_data after the first column of ones has already been added with x_data = sm.add_constant(x_data). As a column of ones has zero variance, after normalization you get a column of nan (as you are dividing by zero). This means that the first of the 3 features that you are passing to tensorflow is completely missing (i.e. it's always nan).
            3. While statsmodels takes as inputs at first y and then X, tensorflow takes as inputs at first X and then y. This means that you have switched the features and target when running the regression in tensorflow.

            I included a complete example below.

            Source https://stackoverflow.com/questions/67095821

            QUESTION

            I() equivalent (used in R), what is the Python equivalent?
            Asked 2021-Mar-23 at 04:34

            The I() function in R is used to create new predictor in Linear Regression, such as X^2 for example:

            ...

            ANSWER

            Answered 2021-Mar-23 at 04:34

            I found the answer, seems to be as simple as:

            Source https://stackoverflow.com/questions/66757217

            QUESTION

            for-loop linear regression generation new dataframe with the results
            Asked 2021-Mar-06 at 13:40

            I want to write a loop on R to perform linear regression on my dataset genes (= 210011 genes and 6 samples total; with columns the gene and the rows the samples) to identify how age and sex affect gene expression. I want to save the fitted value output from the linear regression in a new dataframe (generating basically a similar dataframe where on the columns there are the genes and in the rows the samples).

            so the loop I wrote is:

            ...

            ANSWER

            Answered 2021-Mar-06 at 13:36

            Create a vector of column names instead of column values. Try the following :

            Source https://stackoverflow.com/questions/66506140

            QUESTION

            How to create many Linear Regression models via a For Loop in R?
            Asked 2021-Feb-24 at 00:12

            My problem is for the mtcars data set in R, I need to create all possible additive linear regression models where I'm regressing on the mpg variable. The null model is easy, as there's

            10 choose 0 ways to get the null model, and 10 choose 1 ways to create a SLR on mpg; 10 choose 2 ways to create a two variable regression on mpg; 10 choose 3 ways to create a SLR on mpg; etc.,

            So in total, as this is equivalent to summing across the 10th row in Pascal's Triangle, the total models I need to consider comes out to be 1,024.

            Now, the other tricky part is I need to somehow store each model in some separate object so that all the 2 variable models are grouped together, all the three variable models are grouped together, etc, on top of also storing all them together (though perhaps there's a more efficient way to do this). The reason for this is my task is to look at all of these models, take their AIC scores and their Mallow's Cp scores, store those in a data frame, and then sort those scores from lowest to highest and keep the top 10. On top of this, I need to also be able to store, see, and have access to/use the two best 1-variable models through the two best 10-variable models because I need to provide the r-squared values and adjusted r-squared values for these various models along with the error mean square value. I'm still pretty/relatively new to R/coding in general, but I provide my attempt below:

            ...

            ANSWER

            Answered 2021-Feb-24 at 00:12

            Your approach wasn't so bad. This is how I reproduced your work as you described it:

            Source https://stackoverflow.com/questions/66342630

            QUESTION

            Regression with for-loop with changing variables
            Asked 2021-Feb-11 at 11:44

            I am trying to run a regression in a loop with variables names changing at each loop. Similar to this setup here

            At the end, I would like to save the fitted results in a list.

            My code is the following:

            ...

            ANSWER

            Answered 2021-Feb-11 at 10:23

            Construct the formula using sprintf/paste0 :

            Source https://stackoverflow.com/questions/66152702

            QUESTION

            running multiple regression models using tidymodels
            Asked 2021-Feb-09 at 21:57

            I've recently been using tidymodels to run models and select parameters that best satisfy some objective function. For example using a hypothetical regression on mtcars data (using the regression examples from the bottom answer of this question as an example)

            ...

            ANSWER

            Answered 2021-Feb-09 at 21:57

            There is an experimental package we are developing to do just this called workflowsets. You can install it from GitHub for now, if you are up for trying out a new, still-developing package:

            Source https://stackoverflow.com/questions/66117523

            QUESTION

            Error in matMul: inner shapes (1) and (2) of Tensors with shapes 684,1 and 2,1 and transposeA=false and transposeB=false must match
            Asked 2021-Jan-30 at 16:34

            I am complete beginner to AI as well as tensorflow.js. Currently following the Machine Learning course of Stephen Grider. I should have got a output after the following code but instead i got error. Please help:

            code: linear-regression.js:

            ...

            ANSWER

            Answered 2021-Jan-29 at 21:04

            The error is thrown by

            this.features.matMul(this.weights)

            There is a matrice multiplication between this.features of shape [684, 1] and this.weights of shape [2, 1]. To be able to multiply a matrice A (shape [a, b]) with B (shape [c, d]), b and c should match which is not the case here.

            To solve the issue here, this.weights should be transposed

            Source https://stackoverflow.com/questions/65961477

            QUESTION

            Adding lm summaries to plots RStudio
            Asked 2021-Jan-28 at 14:27

            I'm using this tutorial to perform a linear regression. Is there a way to add the summary (results) of the linear model to the plot in order to save it as a pdf.

            This is the code:

            ...

            ANSWER

            Answered 2021-Jan-27 at 12:12

            What you want to do is surprisingly difficult, which is why most people would not choose to do it that way :)

            The closest solution I could find uses ggplot2 and a lot of other packages. It's possible to do the following:

            1. Create a summary table of the regression model using stargazer::stargazer()
            2. Convert that to a PNG image file using kableExtra::as_image()
            3. Convert the PNG to a grob using grid::rasterGrob()
            4. Use ggplot2::annotation_custom() to embed the table-as-image-as-grob into a ggplot2 chart

            Note that as_image() requires some other packages and an installation of phantomjs.

            Here's an example:

            However, there are other solutions that might be better such as a simple summary using ggpubr::stat_regline_equation() or adding a table grob using the output of broom::tidy().

            I think the simplest way to demonstrate all the options is in a RMarkdown file. Here is the code to copy into an RMarkdown file which you can knit in RStudio.

            Source https://stackoverflow.com/questions/65910265

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install linear-regression

            Add the LinearRegression package as a dependency to your composer.json file:.

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            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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