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Nizamuddin Siddiqui has Published 2307 Articles
Nizamuddin Siddiqui
32K+ Views
To remove a character in an R data frame column, we can use gsub() function which will replace the character with blank. For example, if we have a data frame called df that contains a character column say x which has a character ID in each value then it can ... Read More
Nizamuddin Siddiqui
24K+ Views
In C#, String.Contains() is a string method. This method is used to check whether the substring occurs within a given string or not. It returns the boolean value. If substring exists in string or value is the empty string (""), then it returns True, otherwise returns False. Exception − This ... Read More
Nizamuddin Siddiqui
25K+ Views
There are two methods to create a vector with repeated values in R but both of them have different approaches, first one is by repeating each element of the vector and the second repeats the elements by a specified number of times. Both of these methods use rep function to ... Read More
Nizamuddin Siddiqui
34K+ Views
Most of the times, we need to use packages in R and some packages are restricted to different versions in R, generally to newer versions. Therefore, we might need to find which version of R we are using. To find the R version, we can directly use the command R.Version().Example Live ... Read More
Nizamuddin Siddiqui
37K+ Views
To convert columns of an R data frame from integer to numeric we can use lapply() function. For example, if we have a data frame df that contains all integer columns then we can use the code lapply(df, as.numeric) to convert all of the columns data type into numeric data ... Read More
Nizamuddin Siddiqui
48K+ Views
There are several ways to get only date portion from a DateTime object.ToShortDateString() − Converts the value of the current DateTime object to its equivalent short date string representation.Returns a string that contains the short date string representation of the current DateTime object.ToLongDateString() − Converts the value of the current ... Read More
Nizamuddin Siddiqui
62K+ Views
To remove all rows having NA, we can use na.omit() function. For Example, if we have a data frame called df that contains some NA values then we can remove all rows that contains at least one NA by using the command na.omit(df).That means if we have more than one ... Read More
Nizamuddin Siddiqui
11K+ Views
LINQ Except operator comes under Set operators category in LINQThe Except() method requires two collections and finding those elements which are not present in the second collectionExcept for the extension, the method doesn't return the correct result for the collection of complex types.Example using Except() method Live Demousing System; using System.Collections.Generic; ... Read More
Nizamuddin Siddiqui
271 Views
To find the moving standard deviation in a matrix is done in the same way as in a data frame, we just need to use the matrix object name in place of data frame name. Hence, we can make use of rollapply function of zoo package for this purpose.For example, ... Read More
Nizamuddin Siddiqui
3K+ Views
To round the output of summary function in R, we can use digits argument while applying the summary function.For example, if we have a data frame called df then to find the summary statistics with two digits in the output we can use the below given command −summary(df, digits=2)Example 1Following ... Read More