Calculating Number of days between 2 datepickers - ios

For iOS, how does one calculate the number of days between two dates generated by two different date pickers?

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How to divide a cell's value evenly across a range of cells in Google Sheets?

I have a Google Sheet with values based on each month of the year:
https://docs.google.com/spreadsheets/d/1XIm-1eZZBVttvRECUlU8tCWjVFU8rbMrpypRbn88j00/edit?usp=sharing
There's a Target, an Actual and a Difference column:
I would like to add a formula that would automatically and dynamically adjust the Target column values (B3 to B14) based on an equal division of the value of the Total Difference (D2) divided by the number of months left in the year.
To put that in context; in the screenshot above there is -£600 difference. Let's say we are in January currently. I'd like to divide that £600 equally among the remaining months of the year (i.e. Feb - Dec, so 11 months) and then adjust the Target amount for each month by that sum.
In practice, this would mean increasing the target for each month of Feb - Dec (cells B4 to B14) to be £54.55 higher (i.e. -£600 / 11 = -£54.545, round it to the nearest penny, -£54.55, then make it a positive value; £54.55)
The overall goal is to dynamically adjust the targets as the year progresses, depending on how much difference there is in the total amount.
So, naturally, as the year progresses, the B column values that would be adjusted would become less and less cells (i.e. in Jan, it's 11 cells - Feb-Dec - whereas if we were in June, for example, there would only be 6 cells (B9-B14) to divide the Total Difference figure by).
How can I do this?
I don't know if I full understand your purpose, but if you want to evenly distribute the difference from your target value (12.000) between the remaining months of the year; then you can set your target in B2, and change D2 to =C2-B2:
Then, in B3 you can set this formula:
=MAP(SEQUENCE(12,1,0,1),{0;C3:C13},LAMBDA(mon,amount,
IF(mon=0,B2/12,(B2-SUM(C3:INDEX(C3:C13,mon)))/(12-mon))))
Then, you'll have this chart:

Tableau Yearly Difference

How can I calculate year difference in Tableau, while still showing the year total?
I know I can use the table calculation, but this changes the year data
Drag Year over Columns and measure names onto rows.
On Measure names keep only sales. Turn SUM(Sales) into difference
and drag sum(sales) on measure values shelf.

How do I show data for 4 weeks on a Google Sheets chart by week day?

I want to show data for 4 weeks on a Google Sheets chart.
I have tried to do this and it is mostly ok as this is correct:
The X-axis shows the days of the week
The Y-axis is the weight number
Issues I have with my current implementation are:
I had to make a separate series for each week when I wanted it automatically group the data by week number. (I then can't name each series)
The data is off by one day. Monday's data doesn't show which means Tuesday's data is showing in place of Monday and so on.
Here is a link to the google sheet and a screenshot below: https://docs.google.com/spreadsheets/d/147RMW2JE7MoWz53EZuB-nHj-p_xeKez_ze_0mqq8NGA/edit?usp=sharing
My expected result would look more like this:
Here the lines are shown grouped by each week AND data is shown for each day
The reason why you are missing the first day of every week is that you have checked the Use row 1 as heeaders so every series will remove the first datapoint (monday in your case) and insert it as the label for that series (you can see that in the legend).
If you uncheck that checkbox and change your range for the X-axis so it goes from Monday to Sunday you get the correct graph.
The problem with the previous graph is that although all its datapoints are correct there is no legend. But unfortunately there is no way to insert a legend easily because you cannot go and change this manually, the label for each series has to come from the cells.
What you can do to work around this limitation is change your data so the label for each series sits on top of your data and keep the Use row x as headers checked:
Of course this is not the only solution, you can go on multiple ways here, copy the table in a single sheet for every week, or just live without labels. Stack the weeks horizontally so everyone has its week number on top of the weight column, etc

How to create a data ranged chart in Google Sheets

I'm really struggling to understand how to show a chart in Google sheet that automatically shows the last 7 items. I'm basically trying to create a dashboard. Ideally, I'd like to be able to select a range like last 7 days, last 30 days, month on month (6 months), month on month (12 months), by a quarter
I want a chart that will show A,B,C,D,E,F and G all in one chart.

How to show 1st column series behind 2nd series in Highchart?

I would like to combine the information "orders per weekday" and "orders per hour" in one column chart. The first series would show how many orders where placed on mondays, thuesdays, etc. and a second series would show the distribution between the different hours on each day. This would help to answers question "most orders are places on monday afternoons and sunday mornings..."
The result should look something like this:
The big columns represent the days and the red bars the hours (only four days and 5 hours per day in this example).
How can I place the day-column behind the hour-column?
How can I group the hour-column for each day with the corresponding day-column?

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