Assigning the number in new column based on row count

how do i count the number of times a value appears in a column in excel?
excel count how many times a value appears in a column
excel count number of occurrences of each value in a column
excel count rows with value
r add column to dataframe based on other columns
countif excel
how do i count cells with text in excel?
r create new column based on condition

I would like to know how to increase number based on whether in every 10 row.

For example

test_table <- data.frame(row=c(rev(0:99)))

        > head(test_table,11)
   row
1   99
2   98
3   97
4   96
5   95
6   94
7   93
8   92
9   91
10  90
11  89

I want to add new column when we passed every 10nth row in row column.

So I tried

library(dplyr)
 test_table%>%
   mutate(No=cumsum(n()/10==10))

which gives every No column to be 1. What I look for is the number incrasing from 0,1,2,3 in every 10 row change in data. How can I do that ?

        row No
1    99  1
2    98  1
3    97  1
4    96  1
5    95  1
6    94  1
7    93  1
8    92  1
9    91  1
10   90  1
11   89  1

expected output

   row No
1    99  0
2    98  0
3    97  0
4    96  0
5    95  0
6    94  0
7    93  0
8    92  0
9    91  0
10   90  0
11   89  1

You can do a modular division on row_number:

test_table %>% mutate(No = (row_number() - 1) %/% 10)

#    row No
#1    99  0
#2    98  0
#3    97  0
#4    96  0
#5    95  0
#6    94  0
#7    93  0
#8    92  0
#9    91  0
#10   90  0
#11   89  1
# ...

Ways to count values in a worksheet, Count cells in a column based on single or multiple conditions by using the Count the total number of cells in a range by using ROWS and COLUMNS functions. Count Click Subtotal in the Data tab to add a subtotal row in your Excel Data. Tip: In the above formula, B1:B13 is the column range you want to number based on, and A1 is the cell you typed 1 into, and “Total” is the value you do not want to number. 3. Then drag the autofill handle to the column range you want to number.


You can try using floor after dividing row_number() by 10. This will increase the No at every 10th row:

library(dplyr)

test_table <- data.frame(row=c(rev(0:99)))

test_table%>%
  mutate(No=floor((row_number()-1)/10))

#     row No
# 1    99  0
# 2    98  0
# 3    97  0
# 4    96  0
# 5    95  0
# 6    94  0
# 7    93  0
# 8    92  0
# 9    91  0
# 10   90  0
# 11   89  1
# 12   88  1
# 13   87  1
# 14   86  1
# 15   85  1
# 16   84  1
# 17   83  1
# 18   82  1
# 19   81  1
# 20   80  2
# 21   79  2
#......so on

4 data wrangling tasks in R for advanced beginners, (R adds its own row numbers if you don't include row names.) to perform in R is adding a new column to a data frame based on one or more other columns. There are four ranking window functions supported in SQL Server; ROW_NUMBER(), RANK(), DENSE_RANK() and NTILE(). All these functions are used to calculate ROWID for the provided rows window in their own way.


Here is a base R solution.

test_table$No <- (seq_len(nrow(test_table)) - 1) %/% 10

head(test_table, 15)
#    row No
# 1   99  0
# 2   98  0
# 3   97  0
# 4   96  0
# 5   95  0
# 6   94  0
# 7   93  0
# 8   92  0
# 9   91  0
# 10  90  0
# 11  89  1
# 12  88  1
# 13  87  1
# 14  86  1
# 15  85  1

Create New Columns Based on Operations, A pivotal part of data analysis is to create new columns based on some operation​. Let's get the tips dataset from the Python seaborn visualization library and assign it to the DataFrame df_tips . size, count of people eating meal. Preview the first 5 rows of df_tips using the pandas series head() method. Pandas : Sort a DataFrame based on column names or row index labels using Dataframe.sort_index() Python Pandas : Replace or change Column & Row index names in DataFrame; Python Pandas : How to convert lists to a dataframe; Pandas : Find duplicate rows in a Dataframe based on all or selected columns using DataFrame.duplicated() in Python


How to assign serial number to duplicate or unique values in Excel?, Reuse Anything: Add the most used or complex formulas, charts and anything else Split Tools: Split Data into Multiple Sheets Based on Value; One Workbook to To assign serial number to unique value, the below formula may do you a favor: without losing Data; Split Cells Content; Combine Duplicate Rows/Columns. I want to apply my custom function (it uses an if-else ladder) to these six columns (ERI_Hispanic, ERI_AmerInd_AKNatv, ERI_Asian, ERI_Black_Afr.Amer, ERI_HI_PacIsl, ERI_White) in each row of my dat


How can I count multiple text values in a column?, In each cell of this column there are multiple text values separated by ";" (e.g. "​Barcelona; Then you would get a number of columns, for example, x1, x2, x3. where a given row can have multiple cities separated by ";" and give a count of how Then I would like to add these values to my dataframe as a new variable in R. I want to add in the begining of the dataframe a new column df ['New_ID'] which has the number 880 that increments by one in each row.


Populate a SQL Server column with a sequential number not using , The first approach that may come to mind is to add an identity column to a table​, you can automatically allocate an unique sequential number I will make updates to the tip based on the issues you both encountered. I would like to add a view that will add a new row called "RowCount" say for instance? You can edit the table by "Edit Query" Option. Find the Add Index Column in the "Add Column" Tab. You can see now the new column is added at the last. Customize the column to rename it as "SNO" or "ROW NUM" or anything preferred. Note: You can add from 0 or from 1. You have a Row Number or Ser