I’ve started using knime pretty recently and I came across a situation which I’m not sure how to solve. I have a table with a constant value column as shown in the image (or I can use a second table with one row with this constant value). What I need to do is to subtract the first row of Column 2 from the first row of Column 1 (65-90=-25) and then use this result to subtract the value of the next row on Column 2 from it (-25-23=-68) and so on.

In order words, what I want to do is to update the initial constant value (65) with the results of the previous calculation, so the resulting table would be like:

| Column1 || Column2 |

| 65 || 90 |

| -25 || 23 |

| -48 || 62 |

| -110 || 16 |

I appreciate your help! Thank you!