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#1
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Interpolated charts
When chart data contains #N/A between 2 data points there is a feature in
Excel that interpolates the data in the middle. This is very useful but is there a way of getting hold of that interpolated data. I mean the actual numbers. It would save me a lot of time having to calculate them myself. Thank you |
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#2
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Interpolated charts
Hi,
You need to calculate that value using a formula Assuming the NA value is in cell B4 this will tell you the mid Y value =B3+((B5-B3)/2) Cheers Andy Ben wrote: When chart data contains #N/A between 2 data points there is a feature in Excel that interpolates the data in the middle. This is very useful but is there a way of getting hold of that interpolated data. I mean the actual numbers. It would save me a lot of time having to calculate them myself. Thank you -- Andy Pope, Microsoft MVP - Excel http://www.andypope.info |
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#3
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Interpolated charts
But of course if the X-axis spacing is not equal you will need something a
little more complicated to calculate the appropriate Y value. -- David Biddulph "Andy Pope" wrote in message ... Hi, You need to calculate that value using a formula Assuming the NA value is in cell B4 this will tell you the mid Y value =B3+((B5-B3)/2) Cheers Andy Ben wrote: When chart data contains #N/A between 2 data points there is a feature in Excel that interpolates the data in the middle. This is very useful but is there a way of getting hold of that interpolated data. I mean the actual numbers. It would save me a lot of time having to calculate them myself. Thank you |
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#4
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Interpolated charts
You only need to apply the same formula to the X values in order to get
the mid x point. David Biddulph wrote: But of course if the X-axis spacing is not equal you will need something a little more complicated to calculate the appropriate Y value. -- Andy Pope, Microsoft MVP - Excel http://www.andypope.info |
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#5
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Interpolated charts
Yes, but the OP may be talking about a situation where he has a defined X
point, not mid-way between the adjacent ones, and for which the Y value is NA() and he's looking for an interpolated value. As usual, the answer depends on the question. :-) -- David Biddulph "Andy Pope" wrote in message ... You only need to apply the same formula to the X values in order to get the mid x point. David Biddulph wrote: But of course if the X-axis spacing is not equal you will need something a little more complicated to calculate the appropriate Y value. -- Andy Pope, Microsoft MVP - Excel http://www.andypope.info |
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#6
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Interpolated charts
Yes, you're right.
More like this then, CalcY =PrevY+ (NextY - PrevY)/(NextX - PrevX)*(RequiredX -PrevX) Cheers Andy David Biddulph wrote: Yes, but the OP may be talking about a situation where he has a defined X point, not mid-way between the adjacent ones, and for which the Y value is NA() and he's looking for an interpolated value. As usual, the answer depends on the question. :-) -- Andy Pope, Microsoft MVP - Excel http://www.andypope.info |
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