Dynamic chart, OFFSET, #N/A Help


G

Guest

I have a dynamic line chart with 12 data series that each contains weekly
data for 52 weeks, and set up as a combo box chart. Currently I have data for
only 16 weeks, while the rest of the year is howing zero values. I changed
the zero to #N/A to avoid plotting that on the graph, which worked fine, but
the issue is the X axis. I have tried 2 options but neither produced what I
needed.
* I have used a formula to show the weeks as N/A if no data available on the
next column.
** I used the OFFSET formula to creat a range, but both options plotted the
#N/A on the X axis. How can I incorportate a range successfully in another
OFFSET formula (combo box with dropdown list) to plot only the cells with
data. Any help is greatly appreciated.
 
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G

Guest

Jon,
First my list is populated from another report list on the same sheet. My
chart list is as follow:
Weeks on column B (B66:B117) while my heading/labels start from C65 to N65.
I have this formula on O65 > =OFFSET(B65, 0,$S$64) S64 is my link cell. On
C66 I have this formula > =IF(D7=0,NA(),D7) and copied down C66:N117 this
formula basically looks the above report list and populate the data while
substitute any zero values with #N/A. Up to this point my chart is fine and
the combobox is working fine. Currently my list is showing actual data up to
week 16 and #N/A thereafter.
Here's the formual i'm trying to use to help plot only the data and ignores
#N/A which currently it didn't >
=OFFSET('Model'!$B$66,0,0,COUNTA('Model'!$B:$B,-65),1), I have similar
formula based on the values on column O, as my 'Y' axis values. Model is my
sheet where the report list chart list and the chart reside.


Thanks.
 
J

Jon Peltier

Here's the formula i'm trying to use to help plot only the data and
ignores
#N/A which currently it didn't >
=OFFSET('Model'!$B$66,0,0,COUNTA('Model'!$B:$B,-65),1)

I hope this is
=OFFSET('Model'!$B$66,0,0,COUNTA('Model'!$B:$B)-65,1)
and that B1:B65 are all filled.

Is this the refers-to formula for a named range? You should have one range
for X and one for Y for each series in the chart (though the X can be used
by multiple series).

Named range for X values:
Name: ChartCategories
RefersTo:
=OFFSET('Model'!$B$66,0,0,COUNTA('Model'!$B:$B)-65,1)
Better:
=OFFSET('Model'!$B$66,0,0,COUNTA('Model'!$B66:$B117),1)

Named range for first set of Y values:
Name: ChartValues1
RefersTo:
=OFFSET(ChartCategories,0,1)

Named range for second set of Y values:
Name: ChartValues2
RefersTo:
=OFFSET(ChartCategories,0,2)

etc.

Use
='Model'!ChartCategories
='Model'!ChartValues1
for the X values and Y values for the first series,

='Model'!ChartCategories
='Model'!ChartValues2
for the X values and Y values for the second series, etc.


- Jon
 
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G

Guest

Thanks Jon for the help. I will give it a try and let you know. One thing
though, why do I need to create a range for each series on the 'Y' axis? My
chart is designed to show one series at a time when the user select an item
from the drop down list, colum 'O' gets populated with values for that
particular item. The next time a user select a different item the values for
that item gets populated on the same column 'O'. So i'm thinking one range
for 'Y' (to use column 'O' data), and one for 'X', instead of 12 names for
the 'Y' axis... agree?

Thanks.
 
G

Guest

Jon, while your method does work as is, it doesn't fit my design. Meaning,
your explanation of creating 12 data series will plot 12 line on the chart,
which is not what i'm after. Remember I mentioned I have a combobox with
dropdown list from which a user will select one item out of the 12, and they
should see a single line for that item. Showing 12 lines week by week makes
the chart too busy, besides, i'm really ploting products growth %. There's no
growth relationship between the products themselves, so no sense plotting all
of them at once. Is there a way to accomplish this dynamically and having the
dropdown list working at the same time?

Thanks.
 
J

Jon Peltier

Your dropdown box has 12 items, so assuming a Forms toolbar dropdown, your
linked cell has a value from 1 to 12. Assuming the X is in one column, the
12 Ys in the next 12 columns, and the linked cell to the dropdown is cell
J1, change your Refers To formula for Y to this:

Name: ChartValues
RefersTo:
=OFFSET(ChartCategories,0,'Model'!$J$1)

- Jon
 
G

Guest

Just noticed that when selecting an item from the list the chart plots 2
lines on top of each other. When I hover the mouse over the tick mark, it
will say series2 and on the line will say series1 and that for all 12 items
even though I have series names from series1 to series12! When I click on the
line the formula will say: =SERIES("Series2",,Model!ChartData2,13) and that
for all 12 items as well.. exactly the same forumla. ChartData is my name
range for 'Y' and weeks is my name range for 'X'. I have changed all 12
formulas for 'Y' series as: =OFFSET(weeks,0,Model!$S$64) >> S64 is my link
cell. Also when collapsing the textbox for the 'Y' value under source data,
all 12 lines will point to one same column, but the values on the chart are
actually correct for all 12 items!! I probably messed up somewhere... any
idea?

Thanks.
 
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G

Guest

Yes, I do need to show only one line. Every item I select will show as two
lines one behind the other, and all 12 items will show one line as series1
while the other as series2. But I have named my series as series1, series2,
series3,...series12. None of the items will show series3 - series12.
when you asked me to modify the formula to: =OFFSET(weeks,0,'Model'!$S$64)
you meant for all 12 'Y' values, correct?
 
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