https://community.jmp.com/t5/Discussions/basic-graphing-question/m-p/656807#M84582 <P>Hello! I'm new to JMP and struggling a bit. I have some data graphed ( voltage vs current density) and I'm trying to over lay the ideal diode equation. I can't figure out how to plot the formula over my data. Also I think I'm using the formula function right to take the log of the I data?</P> Mon, 10 Jul 2023 05:36:15 GMT hallef18 2023-07-10T05:36:15Z https://community.jmp.com/t5/Discussions/basic-graphing-question/m-p/656807#M84582 <P>Hello! I'm new to JMP and struggling a bit. I have some data graphed ( voltage vs current density) and I'm trying to over lay the ideal diode equation. I can't figure out how to plot the formula over my data. Also I think I'm using the formula function right to take the log of the I data?</P> Mon, 10 Jul 2023 05:36:15 GMT https://community.jmp.com/t5/Discussions/basic-graphing-question/m-p/656807#M84582 hallef18 2023-07-10T05:36:15Z https://community.jmp.com/t5/Discussions/basic-graphing-question/m-p/657077#M84609 <P>Hi and welcome to JMP! Looking at the data you provided, I think the only thing keeping you from making the graph is that your "log(I)" formula column is listed as Nominal. If you click the red icon to the left of the column name and select "Continuous," then the graph should work as you're expecting.</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Jed_Campbell_0-1689017235419.png" style="width: 400px;"><img src="https://community.jmp.com/t5/image/serverpage/image-id/54553i68734A73E9AB72CF/image-size/medium?v=v2&amp;px=400" role="button" title="Jed_Campbell_0-1689017235419.png" alt="Jed_Campbell_0-1689017235419.png" /></span></P> <P>Also, assuming you're looking to calculate the log base 10 of the absolute value of the "I(A)" column, then you're using the formula function correctly.</P> Mon, 10 Jul 2023 19:29:00 GMT https://community.jmp.com/t5/Discussions/basic-graphing-question/m-p/657077#M84609 Jed_Campbell 2023-07-10T19:29:00Z