Multiple-Linear-Regression | simple python program | Machine Learning library
kandi X-RAY | Multiple-Linear-Regression Summary
kandi X-RAY | Multiple-Linear-Regression Summary
A simple python program that implements a very basic Multiple Linear Regression model
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Multiple-Linear-Regression Examples and Code Snippets
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Trending Discussions on Multiple-Linear-Regression
QUESTION
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 21:44The key issues with your code are the following:
- 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 ofx_data
) is constant. - You are normalizing
x_data
after the first column of ones has already been added withx_data = sm.add_constant(x_data)
. As a column of ones has zero variance, after normalization you get a column ofnan
(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 alwaysnan
). - While statsmodels takes as inputs at first
y
and thenX
, tensorflow takes as inputs at firstX
and theny
. This means that you have switched the features and target when running the regression in tensorflow.
I included a complete example below.
QUESTION
I have a reactive dataframe and I want the user to select the dependent and multiple independent variables from that reactive dataframe and return the regression outputs. Does anyone have recommendations on the best way to do multiple regression on a reactive dataframe in Shiny?
I see this thread: Using R Shiny for Multiple Linear Regression (SelectInput --> multiple=TRUE)
but I have commented showing the code doesn't work.
I also see this question: Perform multiple linear regression with variables based on shiny widget selection
But that is just a simple 1 to 1 regression.
...ANSWER
Answered 2021-Jan-19 at 19:08Ok so I took a look at the first answer you said didn't work and I've slightly modified it to allow you to also select the dependent variable. You get an error when you include the dependent variable in the independent variables but I'm sure you could figure out a way to make sure that the dependent variable isn't included in the independent variables as a selection.
QUESTION
I'm using documentation https://shiny.rstudio.com/tutorial/written-tutorial/lesson2/ and more precisely the following code to add a simple paragraph to my shiny page:
...ANSWER
Answered 2021-Jan-05 at 23:31It's not about HTML it's CSS what you should look for. (;
For example you could copy & paste the CSS styling rules from the webpage you linked into you shiny app (not the recommend way but quick & dirty) to change the appearance of the code
tag like so:
QUESTION
This is my first foray into ggplot2 and I am experiencing difficulties. I'm trying to plot two series of random numbers against an incremented x-axis while showing linear regression for both. So far, I've succeeded in plotting the scatterplots, but the regression line keeps throwing errors. I know it's possible, but I'm missing something for executing the idea. I'm running RStudio Desktop version 1.3.1056, Water Lily with tidyverse loaded.
I know this works to display the scatterplot (I'm open to more elegant variants if suggested):
...ANSWER
Answered 2020-Oct-05 at 18:10Try this example. I believe is close to what you want. Please next time include data to reproduce your issue in a proper format using dput()
. It looks like some variable is missing in your data or you are placing the wrong name. This example can be a good point to start (Also included some solutions using your real data from github):
QUESTION
import pandas as pd
from sklearn.linear_model import LinearRegression as lm
x = data_all[combi_list[0][1:]]
y = data_all[combi_list[0][0]]
lm.fit(x, y)
...ANSWER
Answered 2020-Aug-31 at 13:45In your code
QUESTION
Currently I',m developing a application to analyze stack overflow questions. So I got the data as a json file from the stack API and used following codes to read the data in json file as follows.
...ANSWER
Answered 2020-Apr-08 at 20:24Is this the output you are looking for?
QUESTION
As mentioned in this post, the adjusted R2 score can be calculated via the following equation, where n
is the number of samples, p
is the number of parameters of the model.
ANSWER
Answered 2020-Mar-21 at 16:33Short answer: don't do it (notice that all the posts you link to are about linear regression).
Long answer:
To start with, your definition that
p
is the number of parameters of the model
is not correct. p
is the number of explanatory variables used by the model (source).
In agreement to this definition, the post you have linked to actually uses X.shape[1]
instead of model.coef_
; the latter is suggested in a comment, and it is not correct either (see own comment there).
So, if you insist on computing the r-squared for your GBM model, you can always adjust the code from the linked post (after getting your predictions y_pred
), taking also advantage of scikit-learn r2_score
:
QUESTION
I've been trying to perform a simple multivariate linear regression on some dummy data using sklearn. I initially passed sklearn.linear_model.LinearRegression.fit numpy arrays and kept getting this error:
ValueError: matmul: Input operand 1 has a mismatch in its core dimension 0, with gufunc signature (n?,k),(k,m?)->(n?,m?) (size 2 is different from 1)
which I thought was due to some mistake with the transposition of my arrays or something, so I pulled up a tutorial that used pandas dataframes and set out my code in the same way:
...ANSWER
Answered 2019-Dec-06 at 02:58You train your model using shape of (6,2) dataset.if you check shape of df
df.shape = (6,2)
.
And when you try to predict you are trying with different shape of dataset.
x.shape=(30,1)
what you need is to use the correct shape of dataset.Try this
QUESTION
I am working through this multiple regression problem with this walk through however the code that starts at
section : #Treating categorical variables with One-hot-encoding at website: https://towardsdatascience.com/what-makes-a-movie-hit-a-jackpot-learning-from-data-with-multiple-linear-regression-339f6c1a7022
I ran code up to this point but it doesn't work for (X)
Actual code:
...ANSWER
Answered 2019-Jun-24 at 15:30Your code shouldn't be able to work because you left out 40 lines of codes that she wrote before that snippet of codes. She has defined X
earlier. The codes can be obtained from Github.
QUESTION
I am working through a Python Machine Learning Course on Udemy on the following dataset (showing the first few rows only)
...ANSWER
Answered 2019-Jun-04 at 12:51In this case I think this is just a result of the mixed data types in your input and outputs. For example if you examine x
:
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Install Multiple-Linear-Regression
You can use Multiple-Linear-Regression like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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