Dummy or indicator variables are used to include categorical or qualitative variables in a regression model.
Questions tagged [dummy-variable]
868 questions
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2 answers
check all entries in a column sas and return a dummy variable sas
I am new in SAS and want to check if all entries in a variable in a data set satisfy a condition (namely =1) and return just one dummy variable 0 pr one depending whether all entries in the variable are 1 or at least one is not 1.
Any idea how to…
Stefka
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2 answers
Convert dummy variable to actual value
I have been working on a dataset which is represented in the following way:
P1 P2 P3 P4 P5
0 2 1 0 1
0 1 0 0 0
0 0 0 3 0
0 0 0 1 1
0 0 5 0 0
1 1 0 0 0
I am trying to convert it in to a row in R…
user3562074
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1 answer
R: factors across columns as dummy variable
I am working in R and i need on below problem.
I have my data in below format.
Users Lang_1 Lang_2 Lang_3 Lang_4 Lang_5
user_1 C SAS Python SPSS Java
user_2 R C++ Java
user_3 SAS R Python Octave
user_4 …
himanshu tripathi
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votes
1 answer
Search for and extract words into new column
I have a dataset with 63,000 rows in R. One of the columns contained a list of words in the format '"Fireplace", "Garage", "One story with balcony", "Off street parking",' etc. They are property characteristics listed from sale websites.
I want to…
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1 answer
Trying to generate a dummy variable based on a range of data and one cell
I have a dataset that consists of two Date columns. Both of the date columns are in reference to different events happening. I want to generate a dummy variable that equals 1 if both of the dates and time match. For example, if one date is (YY/MM/DD…
Ronan Dunne
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votes
1 answer
creating dummies out of multiple columns in a dataframe in python
i have a dataframe where i have identified 5 columns which need to be converted to dummies, but i am not able to create dummies from multiple columns.
The entire dataframe is numerical in nature, no categorical values.
consider i have 100 variables…
pratik kandalgaonkar
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2 answers
How to use a skeleton program in Haskell
Here is a little look on how the dictionary program is built
dictionary = [
("thanks",["danke"]),
("always",["immer"]),
("us", ["uns"])
]
as u can see from the dictionary the strings comes in pair of
(string, [string])
thenord
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votes
1 answer
Trying to create a Dummy for Covid period
I'm trying to create a dummy variable for specific dates (covid effect)
When using the code below, got only NA's in the column.
df$dummy <- ifelse(df$date > as.Date("2018-01-01", format = "%Y/%m/%d") &
df$date <…
alexvitoria
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votes
1 answer
Creating dummy variables for more than 2 levels
How do I create dummy variables for more than two levels for categorical data in r? I tried model.matrix but it didn’t work.
Paulyn
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1 answer
Turn values to NA if sum of variables is larger than 1
I'm quite new in R so please forgive me if I don't use the right vocabulary. I am currently dealing with a dataset where I have a few dummy variables. The problem is that for some rows more than 1 dummy variable has a value of 1. If this is the case…
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votes
1 answer
How to one hot encode factor variable that has more than 3 levels?
I want to represent factor variables as 0 and 1 value through one hot encoding in r as data.frame.
Among the factor variables, I would like to perform one hot encode only for variables with three or more levels.
This is my R…
신익수
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votes
1 answer
Dummy Package in R
Could someone help ?
I am using the dummy package in R (function dummy) to convert a categorical variable(10 categories) into dummy variables because some of the algorithms I am using (adaboost and rotation forest), don't handle categorical…
Pepe
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votes
1 answer
How to insert a statement inbetween lines with the help of preprocessor directives in C++?
I'm trying to program an Arduino Due to PWM a LED matrix by turning the LEDs on and off very quickly. In order to control brightness I want to add extra instructions between the on and off states of the LEDs. The brightness should be set by a…
uzumaki
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1 answer
What is R algorithm for dummy coding model matrix?
I noticed when using a dummy coding for fitting my linear models R excludes certain parameters when forming model matrix. What is the R algorithm for doing this?
Justin Thong
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1 answer
how to collapse 2 variables by dummies in panel data
I have to collapse some variable of my dataset but I’m getting issues.
Basically, there are 2 variables
valor_receita_propria (in English is own_revenue_value)
qt_tec_total (or total_tec_qt, the numberof technicians in a institution).
There…
Lucas Carvalho
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