Today lets tackle a very familiar problem. You have a bunch of very long, complicated file names & paths. Your boss wants a list of files extracted from these paths, like below:
Of course nothing is impossible. You just need correct ingredients.
I cannot help you with a strong cup of coffee, so go and get it. I will wait…
Back already? well, lets start the formula magic then.
Extracting file name from a path
If you observe the file paths carefully, to extract the file name, we need to know,
- Position of last \ in the full path text
Of course there are many methods find where the last \ is. You can find a very excellent summary of these techniques in our formula forensics #21 – finding the 4th slash.
Today, let us see a new technique (well, sort of).
Finding the position of last \ using formulas
Before writing any formula, first let me clarify the only assumption:
- File path is in cell B4
Now, last \ is nothing but first \ when read from right.
Read that line again.
Got it? Good, lets move on.
How do we find the first \ from right?
If we can list down all individual characters from path right to left, then we just have to find the first \ in that.
Listing down individual characters from a given text
To get 5th character from text in B4, we can use MID formula like this:
=MID(B4,5,1)
Suppose you want both 5th and 6th characters from B4, you can use:
=MID(B4,{5,6},1)
This formula returns an array of 5th and 6th characters from the text in B4.
Cool, extending the logic, =MID(B4, {6,5},1) would give 6th & 5th characters in B4.
Idea!
If we can replace {6,5} with decreasing numbers starting from length of text B4 all the way to 1, then we can list all characters in B4, right to left.
But this leads us to next problem – listing numbers from a specific value (length of B4) to 1 in descending order.
Listing numbers from n to 1 in that order
We can use ROW() formula to generate sequence of numbers like this:
=ROW(1:10) will give {1,2,3…,10}
note: this returns an array, so you need to use it with Ctrl+Shift+Enter
So if we can use =ROW(1:LEN(B4)) we could get numbers from 1 to length of text in B4 {1,2….LEN(B4)}
Unfortunately this will not work as 1:LEN(B4) is not a valid reference.
But we can fix that with INDIRECT, like this:
=ROW(INDIRECT(“1:” & LEN(B4)))
Tip: INDIRECT formula lets you construct a reference by using values in other cells as shown above.
Alternative: You can also use OFFSET to get the same result like this: =ROW(OFFSET($A$1,,,LEN(B4))). More on OFFSET here.
But wait…
So far, we have only generated numbers from 1 to n. But we need numbers from n to 1.
No sweat, we just subtract the numbers {1,2…n} from n+1 to get the list {n,n-1,n-2….2,1}
Like this:
=LEN(B4)+1 – ROW(INDIRECT(“1:” & LEN(B4)))
Using these numbers to list characters in file path in reverse order
Take a sip of that coffee, its getting cold!
Now, lets integrate our numbers in to MID like this:
=MID(B4, LEN(B4)+1 – ROW(INDIRECT(“1:” & LEN(B4))), 1)
The blue portion gives you numbers {n…2,1}
The orange portion gives you letters from right to left.
But we wanted the last \
Oh right. We do not need these letters from right to left. We instead want to find the last \ in our file path. So now we just ask Excel where the first \ is in this reversed text.
=MATCH(“\”, MID(B4, LEN(B4)+1 – ROW(INDIRECT(“1:” & LEN(B4))), 1), 0)
Blue portion gives you letters in reverse order
Orange portion finds the first \ in that.
Tip: Learn more about MATCH formula.
Extract the file name
Once you know where the last \ is, finding the file name is easy.
use =MID(B4, position_of_last_slash + 1, LEN(B4))
We need to +1 because we do not want the slash in our file name.
Demo of the entire formula in action
Okay, lets see all these steps in action in one go.
How to find the extension?
Extension is few letters added at the end of file to indicate its type. For example, excel files usually have xls, xlsx, xlsm as extension.
So how to find this extension?
Extension & file name are separated by a dot .
But often file name itself can have a dot.
In other words, Extension is text in the file name followed by last dot.
Sounds like same problem as finding the last \ and extracting file name. So I will skip the details.
But assuming the file name is in D4, extension can be found with =RIGHT(D4,MATCH(“.”,MID(D4,LEN(D4)-ROW(INDIRECT(“1:”&LEN(D4))),1),0))
NOTE on both formulas
Both file name & extension formulas are array formulas. This means after typing them, you need to press Ctrl+Shift+Enter to see correct result.
Bonus tip: Getting the file names & path from a folder
If you ever want to list down all files in a folder use this.
- Open command prompt (Start > Run > Cmd or Start > Cmd)
- Go to the folder using CD
- Type DIR /s/b >files.csv
- Close command prompt
Now you can see all the files in that folder in files.csv. Double click on it to open in Excel and run your magic 🙂
Download Example workbook
Click here to download the example workbook. The file uses slightly different formulas. But works just the same. Examine it and learn more.
How do you extract file names & as such?
Do you use formulas or do you rely on some other technique to extract portions of text like file names, mail addresses etc. Please share your tips & ideas using comments.
Extract often? You will dig this.
Analysts life is filled with 3 Es – extraction, exploration & explanation. And like a good assistant, Excel helps you in all 3.
If you find yourself with a shovel, bucket and boat load of data often, you are going to enjoy these articles:
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?