Zend Anwar

Full stack web developer

Author: admin

R Variable Assignment

var_assign1 valid Variable can use in number,underscore var_assign% Invalid Can’t use ‘%’.  dot(.) and underscore allowed. 2var_assign invalid Variable can’t start with number .var_assign , var.assign valid Can start with a dot(.) and the dot(.) with join. .2var_assign invalid Variable started with dot & number _var_assign invalid Variable starts with _ which is not valid

Read More

R data types

R not like other programming languages like C and java,the variables are not declared as some data type. R basically object base.There are many types of R-objects. The frequently used ones are − Vectors Lists Matrices Arrays Factors Data Frames These objects is the vector object and there are six data types of these atomic […]

Read More

R script

# My first program in R Programming > strVar <- “Hello, World!” > print ( strVar) [1] “Hello, World!” Comments #This is R comments  

Read More

Hello world in R

print(“Hello World”)

Read More

R graphics engine version 12 is not supported by this version of RStudio. The Plots tab will be disabled until a newer version of RStudio is installed.

This warning message mean that, The current RStudio version is 1.0.143. Download and install the newest version. > RStudio.Version()$version [1] ‘0.99.896’ Please update your version.

Read More

Magento Error: Item (Mage_Core_Model_Store) with the same id “0” already exist

There can be multiple rows inserted with the same value in tables core_store, core_website and core_store_group. You have to delete such duplicate rows from core_store, core_website and core_store_group table. That is, if you have three rows with same value then remove the two duplicate rows. Refresh Cache from System -> Cache Management.

Read More

‘python’ is not recognized as an internal or external command

It’s very simple, just modify python install. just follow image.

Read More

Fatal error: Allowed memory size of 134217728 bytes exhausted in WP

it’s a memory issue on server side. you should check your php max memory limit on your hosting. ask your hosting provider to increase it if you can’t do it manually yourself

Read More

How to check OS and version using a Linux ?

For debian based system cat /etc/*_version or for a Red Hat based system cat /etc/*-release

Read More