Fit Regression To Selected Data In GraphPad Prism

In this video tutorial, I will show you how to fit a regression curve to selected data in GraphPad Prism. Sometimes, you may want to plot all data points on a graph, but only fit a regression model to a subset of data. In this example, I will fit a linear regression to only half of the data.
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[@StevenBradburn]

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[@isabelecarvalho8779]

So thanks! Excellent video!

[@kamranshah7498]

Please do PCA and CCA analysis. . also Please choose a Simple data example that we can understand. . Your videos are great and im learning alot from your tutorials. .

[@ambikagadhvi652]

really useful, thank you!!

[@MiladGhorbani-d1g]

Great

[@alexisjose7515]

How to see and insertar the fit ecuation in the plot?, Thank you

[@shrabanibasak1898]

Thank you so much for your videos..i need a help regarding curve fitting..in my experiment i am checking how pH affects enzyme activity..it is poor at very acidic pH say,3, is maximum around 5-5.5, then again gradually wanes down..since prism automatically connects all the data points, i am getting a hump in the curve generated as there is an outlier..how do i keep my data point, but ensure that the curve doesn't paas through it to give a clean shape..

[@NeuralManifolds]

is it possible to show the X and Y- axis intercept on the graph for the fitted line? The analysis result provides the intercept values but the graph doesn't show the intercepts

[@AnneMari93]

Hello! Imagine that you your points here from two different groups, A and B. Lets say the point from A look like your points in the range 10 to 25. And that the points from group B have similar pattern, but have in general lower y-values. How can you in the graph fit one line for group A and one line for group B?

[@StevenBradburn]

Hi Anne,
So, you will have to perform 2 separate regressions (data in separate columns for each group) and plot these lines on the same graph. Does that make sense?
Steven

[@AnneMari93]

@@StevenBradburn yes, kind of. But I guess if I do that, then the two lines wil have different slope, not just different intercept....? I want the lines for the model y~covariate+group_factor, not y~covariate*group_factor. Or, sometimes I want the interaction model, but I also want to plot the model lines without the interaction 😊