http://eriqande.github.io/rep-res-web/lectures/ggplot_2_reshape_facets_stats.html WebJun 25, 2016 · 2. The long is more flexible in use. It allows you to filter on size for example. SELECT MAX (price) where size='L'. Also it allows for indexing on the size and on the id. …
เปลี่ยนข้อมูล Long เป็น Wide Format ด้วย R Excel และ SQL
Web3.8 Reshaping data - long vs wide format. 3.8. Reshaping data - long vs wide format. So far, all of the examples we’ve shown you have been using ‘tidy’ data. Data is ‘tidy’ when it follows a couple of rules: each variable is in its own column, and each observation is in its own row . Making data ‘tidy’ often means transforming the ... WebOct 13, 2024 · Sorted by: 8. Your data is in wide format so it's better to convert it to long format to work with ggplot. Here I use tidyr::gather () to do that. library (tidyr) library (ggplot2) df_long <- df %>% gather (Year, Sales, -Region) df_long #> Region Year Sales #> 1 A 2016 8758.82 #> 2 B 2016 25559.89 #> 3 C 2016 30848.02 #> 4 D 2016 8696.99 … high frequency trading bad
Wide vs. long data - Anvil
This post attempted to describe what tabular long and wide formats are with some examples, and how to deal with them using Python and Pandas. Each format works best for certain tasks: the long format allows data to be stored more densely, while the wide format has more explanatory power if tabular formats … See more You can think of the wide-format the “Excel” way. Think about this. You have salespersons and the data about each sale during the last year grouped per month, how do you … See more Without much of a preamble let me show you the same data described above but using the long format. Since it is too long (pun intended again) I used, again, three points to state that not all the information is shown in the table. … See more Assume that the table was created and the data was recorded per day and we can grab it using a function. In this case, the function fakes the data, in the real world the function would … See more Think about this problem. You are recording interactions on a website and there are three types: view, click, and conversion. The task at hand is to generate a table that … See more WebNov 18, 2011 · This isn't a necessary property of long format, that it's less space efficient, but generally you would have a compound variable description in the column names in wide that would be separated and given a new column, or multiple columns in long. Therefore, it will take up more space due to those redundancies. On the handling side it's easier to ... WebMar 5, 2024 · In Wide format, categorical data is always grouped. It is easier to read and interpret as compared to long format while on long format every row represents an … high frequency trading illegal