This post is authored by Martin, one of our readers.
Situation:
Sometimes I encounter data in my tables with blank cells where there is a repeated value from the cell directly above. See below:
This can be annoying when it comes to interpreting the data and when sorting columns.
Solution:
Here’s the solution I use.
1. Select the whole table. I favor the shortcut Ctrl A to do this. Make sure you perform this shortcut from within the table though as otherwise the entire worksheet with be selected. This gives us Figure 2:
2. Next we will open the Go To dialog box. This is a very useful dialog for selecting certain types of cells, for example cells containing formulas, constant values, visible cells and so on. F5 or Ctrl G both work as keyboard shortcuts.
3. Click the Special button (see Figure 3)
4. In the next screen select Blanks.
5. Click OK and notice that all blank cells are now highlighted in the table (Figure 5). Notice too, the position of the active cell. This is the one un-shaded cell in this selection. In this example it is cell D3. If the table were fully complete this cell would show the same value as the cell above it – cell D2 – the word Office.
6. Next we will use the fact that cell references in Excel by default behave in a relative manner. That means when you copy a formula to another cell, the cell reference in the formula change relative to the location in the worksheet it has been moved to unless they have been made absolute.
7. Without clicking any of the cells in the data, simply enter the following simple formula:
=D2
If you are following along here with a different table, then you will substitute the cell reference of the cell directly above your active cell. (Figure 6)
8. Next the important part. We need to copy this simple formula to all the other blank cells which could number in the hundreds or thousands or greater still. How do we do it?
Simply by using one of the best keyboard shortcuts I know in Excel: Ctrl & Enter.
This shortcut when used in a single cell will enter the value inputted into the cell and keep that cell active, instead of performing a carriage return to the next row.
But, when used over a range of cells, Ctrl & Enter together will copy the value of the active cell into all cells in the selection.
In this case, we are not going to copy the value of D2 into all blank cells, but the relative cell that appears over each blank cell. In cell D3’s case this was D2. In A3’s case for example it is A2 and so on.
After CTRL Entering the formula the worksheet now looks like:
9. There is one last important step. These pasted valued are, as we have seen, relative formulas. If I were to change the sort order in one of the columns, for example to identify which Cost in column E is the highest, my table would be completed distorted as the formulas in the changing rows are all retrieving the value in the cell above. See Figure 8.
I’ll Undo my flawed Sort by clicking Ctrl Z.
The final step therefore is to change these formulas into constants so that this type of problem can be avoided.
To do this, select the table, (or if the formula cells remain highlighted, you won’t need to select the table at all).
Now copy your selection with Ctrl C.
Next, perform a Paste Special / Values to replace the formulas with their constant equivalents – Figure 9.
And that’s it!
Thank you Martin
Many thanks to Martin for sharing this simple yet very beautiful trick with all of us. If you enjoyed this article, say thanks to Martin.
How do you deal with Blank Cells
Barking dogs, bad bosses and blank cells are everywhere. I am eager to know how you deal with them. Please share your tips & techniques with us using comments.
More on Blank Cells and other Unclean Data
If you constantly deal with blank cells or other types of unclean data, read these articles to learn few more tricks.
13 Responses to “Gantt Box Chart Tutorial & Template – Download and Try today”
Hi Chandoo
As one of your students I have followed your detailed example through with great success. However, Excel is acting in an unexpected way and I wonder if you could take a look?
http://cid-95d070c79aef808e.office.live.com/self.aspx/.Public/Gantt%20Box%20Chart.xlsm
On my version, I have to type 40239 (Which equates to 2 Mar 2010) to get the chart to display 31 May 2010 (which should be 40329)!!??
Have I done something wrong or is Excel acting up?
Thx
Oli
PS Your example file in 2007 displays correctly.
Hi,
I like this idea a lot, but I agree the name is a little drab.
As an American I may just be seeing things, but to me the combination of lines and bars on your chart looks like a bunch of cricket bats.
Maybe you could work that into a catchier name. 🙂
Cheers!
Here is some code I use to keep the axis synched.
It may be useful to some of your readers
It is based on a comment I saw on Daily Dose of Excel.
Function SynchGanttAxis(Cname, lower, upper)
'Sets the X min and X max for Category axis
Application.Volatile
On Error Resume Next
'
'Top Horizontal Axis
With ActiveSheet.Shapes(Cname).Chart.Axes(xlCategory, 1)
.MinimumScale = lower
.MaximumScale = upper
End With
'Bottom Horizontal Axis
With ActiveSheet.Shapes(Cname).Chart.Axes(xlValue, 2)
.MinimumScale = lower
.MaximumScale = upper
End With
End Function
Function SynchVerticalAxis(Cname, lower, upper)
Application.Volatile
On Error Resume Next
' Excel 2007 only
'Right hand vertical axis
With ActiveSheet.Shapes(Cname).Chart.Axes(xlValue, 1)
.MinimumScale = 0
.MaximumScale = upper
End With
End Function
@Oli.. Can you check your file again.. I see 40329...
@Dave: Even I saw things.. the bars actually looked like lollipops. How about calling this lollipop chart - now that would be yummy and goes along the tradition of naming charts after eatables (bar, pie, donut...)
@Bob: Superb stuff... thanks for sharing 🙂
Hi Chandoo
This looks really good and I think it can also be applied to show project phases / milestones.
Question: Thinking further could this be amended to display a project lifecycle (Idea through to Implementation say 7 phases) on one bar / row? Just imagine 20 projects within a programme all on one chart one bar each showing their respective lifecycle stages i.e. on one page.
Idea: As the Gantt Box Chart this is quite intensive to set up re formatting etc how about the added extra of once you have completed this to "Save as template" i.e. saves the formatting and layout of the chart as a template so you can apply to future charts. Simple to do and will save the time formatting etc again and again and again.
Therefore tip: Click on your chart demo and then click on Save As template icon (2007) - edit file name and click on save. Ready to use / apply via Templates in Change Chart Type window.
Thanks and be very interested if the lifecycle question can be resolved
Mike
How embarrassing.
I was obviously suffering from numerical dyslexia. I was one of those days.
@Mike H: You can easily make this chart to work like a generic project lifecycle plan chart. All you have to do is,
1. in a separate sheet define the steps of lifecycle and various dates in a table (with 5 columns for each of the projects you have).
2. now use a control cell to input the project name you want to show in the chart
3. based on the input, use OFFSET Formulas to get the correct data
4. Rest is same as the tutorial above
For more info on the dynamic charting visit http://chandoo.org/wp/tag/dynamic-charts/ and http://chandoo.org/wp?s=OFFSET
Your solution is really smart but in the en Excel isn't meant to do stuff like this. I, as a former PM, always thought is was frustrating that you had to do stuff like this for something simple like a Gantt chart. So I built Tom's Planner. And would like to plug it here. I think it really solves the problem you are trying to solve in the most efficient way. Check out http://www.tomsplanner.com for a free account or play around with the demo.
Hi there,
Chandoo - this is really a very nice and helpfull chart - I adopted it, so I can report a forecast or the delay of a certain task (coming from my role as an auditor for projects).
One topic I´m currently struggeling with: I do have a project lasting for lets say 12 month. For a management reporting, I want to have kind of snapshot, lets say one month back and 2 month in the future. I tried with the offset formula, but failed. Any idea?
Thx
Lopi
[...] Ein viel geliebter Klassiker ist die Erstellung von GANTT-Diagrammen mit Excel. Wir hatten das Thema wiederholt schon hier. Chandoo.org hat sich mal wieder mit einer neuen Variante hervorgetan: Das GANTT-Box-Chart. [...]
[...] [...]
Hi Chandoo - fantastic xls. One thing I can't figure out how to do is adjust the alignment of the vertical axis. I would like to left align so that I could indent to represent sub tasks. Can that be done? Or is there a better way?
I've been trying to work out if there's a way to show weekends on the graph. The closest thing I've got is to add them on a secondary axis, but then I haven't been able to keep both axis lined up together! Any ideas?
Following on from this - is it possible to show things like holidays?