We provide affordable online training course(via ZOOM meeting) for Python and R programming at fundamental level, click here for more details. The mechanism for copying a list in Python appears somewhat different than in other programming languages. If you just use equal symbol to assign an existing list to a new one, both objects refer to the same one which is stored in the computers memory. Say we have a list for favorite languages and Read more
We provide affordable online training course(via ZOOM meeting) for Python and R programming at fundamental level, click here for more details. After a function is defined and will be called, it is natural to pass required information in the calling statement. In the following example, we create a function about traveling with parameter person and country, for printing the country people have recently traveled. Sometimes, there are multiple elements that will be passed as the Read more
rdatacode provide affordable online training course(via ZOOM meeting) for Python and R programming at fundamental level, click here for more details. Python provides function remove() to remove items in a list based on its value, but it removes only the first occurrence of instances if there are more than one such items existing in the list. From the code example above, we can see there is still a “Toyota” present in the list after we Read more
rdatacode provide affordable online training course for Python and R programming at fundamental level, click here for more details. If you want to test if some particular items are in a list, you can use ‘in’ or ‘not in’ keywords in Python. Consider that we have a list containing names of 6 student candidates, then we can test if ‘Bob’ or ‘White’ are in the list. Sometimes you can also test whether some items are Read more
rdatacode provide affordable online training course for Python and R programming at fundamental level, click here for more details. Slicing a list in Python is a kind of operation that returns part of a list. The basic form of a slice is using starting and ending index with colon between of a list inside square brackets following a list. Say we have a list for family member, and will get part of a list from Read more
We provide affordable online training course for Python and R programming at fundamental level, click here for more details. In Python, if a string variable is concatenated with a numeric value directly, an error comes. In the following code example, a string variable ‘ strva’ is concatenated directly with number 2, Python returns a traceback, because these two data types can not be concatenated without transformation. To overcome this shortage, str() function can be applied Read more
We provide effective and economically affordable online training courses for R and Python, click here for more details and course registration ! arrange() function from Dplyr package in R provides an alternative way as sort() function in R base installation for sorting a data frame with respect to variables, either in ascending or descending order. Moreover, Dplyr is part of a bigger package framework called ‘tidyverse’, and it allows its functions to be chained using Read more
We provide effective and economically affordable online training courses for R and Python, click here for more details and course registration ! Dplyr is a package in R. It belongs to Tidyverse framework, and is allowed to use pipeline structure to chain multiple operations together into one statement. There are many functions in Dplyr package, and one of them is filter(). filter() is used to select observations in terms of specific conditions. For example we Read more
We provide effective and economically affordable online training courses for R and Python, click here for more details and course registration ! Python’s dictionary object type provides a function get() to return the value of the key in a dictionary. The difference between get() method and using bracket to index the key is that get() will return NULL in result when the key is not present, while the latter raises an error for nonexistent key. Read more
We provide effective and economically affordable online training courses for R and Python, click here for more details and course registration ! Dictionary in Python is a useful data object that stores key-value paired information. It can be nested, combined with lists or with dictionaries. In this post, we briefly introduce three nesting dictionary structures: dictionaries inside a list, lists inside a dictionary, and dictionaries inside a dictionary. The most useful case of this hierarchical Read more