VARIABILITY ACROSS YEARS-MONTHS PAGE

VARIABILITY OF DATA IN EACH MONTH, OVER THE PAST YEARS

VARIABILITY OF  DATA FOR EACH CATEGORY AND SUB CATEGORY IN EACH MONTH, OVER THE PAST YEARS

 

in each item type view, data are about:

  • expense
  • n° of purchases
  • n° of days of purchase

 

only past data are considered:

  • therefore, the most recent year of expense isn’t considered for the calculations, because it’s regarded as the current year

for example: you started logging expense on December 2016. 2017 starts an you log expense on January: the card for January shows label ‘no past data’;

the cards for items with expense only in the most recent year of expense, show label ‘no past data’

 

the red line in the center of the bar graph

it represents the average (for example the average expense in the same month, over the past years)

 

the length of the green bar

for example for expense, it represents, how much, on average, the actual expense in the same month in each of the past years, differs from the average of that expense, as a percentage of that average

the shorter the bar, the less variable, on average, the actual data in the same month in each of the past years, from the average (the less, on average, the data in the same month, changes from year to year)

  • if Var% is over 100%, the bar length doesn’t change

 

the data tell you, whether:

  • the data in the same month is stable over the years
  • and therefore, whether the average data is a good indicator of the actual data
  • the months with the most stable data, over the years
  • the items with the most stable data in the same month, over the years

 

for example:

  • is the expense in March stable, over the years?
  • is the expense on heating stable in February, over the years?

 

Screenshot_2018-04-06-16-32-54

 

for example:

  • the expense in September has been very stable from 2015 through 2016, and it’s the most stable among all months
  • on average, the expense on September of 2015 and in September of 2016, differs from the average expense in September of 2015 and 2016 by $12.56 or by 3.3% of the average (Avg: $380.28) (range: $367.72 – $392.84)
  • the average expense is a good indicator of the actual expense
  • if your spending habits don’t change over time and barring unexpected events that affect your spending, that average expense is a good predictor of how much you’ll spend, more or less, in September this year and in the next few years (in that example, in 2017, 2018)

 

 

tap any month card:

  • to see average data and data variability over the past years, for each category with expense in the tapped month; for example, the expense in March on Footwear and Medicines has been quite stable from 2015 through 2016

 

Screenshot_2018-04-06-17-03-42

 

tap any category card:

  • to see average data and data variability over the past years, for each sub category, of the tapped category, and with expense in the tapped month

 

you can also sort the items by higher n° of years of expense, to see the most common or the rarest items over the years (in those screenshots, it’s all 2 years out of 2 past years of expense)

Screenshot_2018-04-06-17-13-02

 

 

tap any category card, in tapped category’s sub categories view:

  • to see average data and data variability over the past years, for each sub category, no matter the category it belongs to, and with expense in the tapped month

 

Screenshot_2018-04-06-17-19-07

 

 

say, you want to get data on a sub category, but don’t know all the months where it had expense

  • you can tap the C icon
  • and tap and hold on the card for the item you’re interested in, say footwear
  • and then you close the list and tap the cards for the proper months

 

 

say, you removed some sub category from consideration, for example, some exceptional expense, because you want to know the variability of your ordinary expense :

  • you can highlight the bar graph for the months (or categories) with removed sub categories, by tapping the pencil icon, to find all the months (categories) with removed sub categories
  • and then tap the globe icon
  • and you’ll see the variability of the month’s (category’s) ordinary expense