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#1




intersection of 2 graphs
I plotted 2 sets of data on the same set of axes.. now I need to find the
intersection point of the two trendlines. Please let me know how I can do this (if I can)? This is probably very trivial.. really appreciate all the help. Thanks! 
#2




Hi,
Have a look at this explanation. http://www.andypope.info/charts/intersection.htm Cheers Andy utopian_sorceror wrote: I plotted 2 sets of data on the same set of axes.. now I need to find the intersection point of the two trendlines. Please let me know how I can do this (if I can)? This is probably very trivial.. really appreciate all the help. Thanks!  Andy Pope, Microsoft MVP  Excel http://www.andypope.info 
#3




thanks for the link.. your excel worksheet says that your intersections
formula is evaluating to an error though. apparently, excel doesn't understand what is "lineb", could you explain further pls? also, would this method work when I'm not using line segments between data points, but an exponential trendline for the entire set? if it helps, i'm trying to do load line analysis of a resistor and a diode.. so I have this exponential looking graph and this straight line and I need to find where they intersect thanks so much! really appreciate. "Andy Pope" wrote: Hi, Have a look at this explanation. http://www.andypope.info/charts/intersection.htm Cheers Andy utopian_sorceror wrote: I plotted 2 sets of data on the same set of axes.. now I need to find the intersection point of the two trendlines. Please let me know how I can do this (if I can)? This is probably very trivial.. really appreciate all the help. Thanks!  Andy Pope, Microsoft MVP  Excel http://www.andypope.info 
#4




Hi,
LineB is a named range. In the example check under the menu Insert Names Define. If you want to do intersects of a trend line then you will need to generate some x and y values for the trendline and use those. Use LINEST for this purpose http://www.stfx.ca/people/blie ngme/ExcelTips/Polynomial.htm Cheers Andy utopian_sorceror wrote: thanks for the link.. your excel worksheet says that your intersections formula is evaluating to an error though. apparently, excel doesn't understand what is "lineb", could you explain further pls? also, would this method work when I'm not using line segments between data points, but an exponential trendline for the entire set? if it helps, i'm trying to do load line analysis of a resistor and a diode.. so I have this exponential looking graph and this straight line and I need to find where they intersect thanks so much! really appreciate. "Andy Pope" wrote: Hi, Have a look at this explanation. http://www.andypope.info/charts/intersection.htm Cheers Andy utopian_sorceror wrote: I plotted 2 sets of data on the same set of axes.. now I need to find the intersection point of the two trendlines. Please let me know how I can do this (if I can)? This is probably very trivial.. really appreciate all the help. Thanks!  Andy Pope, Microsoft MVP  Excel http://www.andypope.info  Andy Pope, Microsoft MVP  Excel http://www.andypope.info 
#5




ok i think i get it thanks so much again.. i'll go fiddle with my data...
"Andy Pope" wrote: Hi, LineB is a named range. In the example check under the menu Insert Names Define. If you want to do intersects of a trend line then you will need to generate some x and y values for the trendline and use those. Use LINEST for this purpose http://www.stfx.ca/people/blie ngme/ExcelTips/Polynomial.htm Cheers Andy utopian_sorceror wrote: thanks for the link.. your excel worksheet says that your intersections formula is evaluating to an error though. apparently, excel doesn't understand what is "lineb", could you explain further pls? also, would this method work when I'm not using line segments between data points, but an exponential trendline for the entire set? if it helps, i'm trying to do load line analysis of a resistor and a diode.. so I have this exponential looking graph and this straight line and I need to find where they intersect thanks so much! really appreciate. "Andy Pope" wrote: Hi, Have a look at this explanation. http://www.andypope.info/charts/intersection.htm Cheers Andy utopian_sorceror wrote: I plotted 2 sets of data on the same set of axes.. now I need to find the intersection point of the two trendlines. Please let me know how I can do this (if I can)? This is probably very trivial.. really appreciate all the help. Thanks!  Andy Pope, Microsoft MVP  Excel http://www.andypope.info  Andy Pope, Microsoft MVP  Excel http://www.andypope.info 
#6




intersection of 2 graphs
hi,
I have the same problem. I tried to use the function in the example but it is not working. can you explain more please. "Andy Pope" wrote: Hi, LineB is a named range. In the example check under the menu Insert Names Define. If you want to do intersects of a trend line then you will need to generate some x and y values for the trendline and use those. Use LINEST for this purpose http://www.stfx.ca/people/blie ngme/ExcelTips/Polynomial.htm Cheers Andy utopian_sorceror wrote: thanks for the link.. your excel worksheet says that your intersections formula is evaluating to an error though. apparently, excel doesn't understand what is "lineb", could you explain further pls? also, would this method work when I'm not using line segments between data points, but an exponential trendline for the entire set? if it helps, i'm trying to do load line analysis of a resistor and a diode.. so I have this exponential looking graph and this straight line and I need to find where they intersect thanks so much! really appreciate. "Andy Pope" wrote: Hi, Have a look at this explanation. http://www.andypope.info/charts/intersection.htm Cheers Andy utopian_sorceror wrote: I plotted 2 sets of data on the same set of axes.. now I need to find the intersection point of the two trendlines. Please let me know how I can do this (if I can)? This is probably very trivial.. really appreciate all the help. Thanks!  Andy Pope, Microsoft MVP  Excel http://www.andypope.info  Andy Pope, Microsoft MVP  Excel http://www.andypope.info 
#7




intersection of 2 graphs
Hi,
There is not a lot more to explain. The user function will not work if you do not have any or all of the following, the code for the user defined function macros enabled the named ranges used in the formula specified If you need more help you will need to explain exactly what *your* problem is as the post you tagged on to has 2 problems/solutions in it. Cheers Andy  Andy Pope, Microsoft MVP  Excel http://www.andypope.info "tinga" wrote in message ... hi, I have the same problem. I tried to use the function in the example but it is not working. can you explain more please. "Andy Pope" wrote: Hi, LineB is a named range. In the example check under the menu Insert Names Define. If you want to do intersects of a trend line then you will need to generate some x and y values for the trendline and use those. Use LINEST for this purpose http://www.stfx.ca/people/blie ngme/ExcelTips/Polynomial.htm Cheers Andy utopian_sorceror wrote: thanks for the link.. your excel worksheet says that your intersections formula is evaluating to an error though. apparently, excel doesn't understand what is "lineb", could you explain further pls? also, would this method work when I'm not using line segments between data points, but an exponential trendline for the entire set? if it helps, i'm trying to do load line analysis of a resistor and a diode.. so I have this exponential looking graph and this straight line and I need to find where they intersect thanks so much! really appreciate. "Andy Pope" wrote: Hi, Have a look at this explanation. http://www.andypope.info/charts/intersection.htm Cheers Andy utopian_sorceror wrote: I plotted 2 sets of data on the same set of axes.. now I need to find the intersection point of the two trendlines. Please let me know how I can do this (if I can)? This is probably very trivial.. really appreciate all the help. Thanks!  Andy Pope, Microsoft MVP  Excel http://www.andypope.info  Andy Pope, Microsoft MVP  Excel http://www.andypope.info 
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