Change a single row in a column

[Tamas]

Hi all,

does anybody knows how I could change a single row of a column? I have a “signal column” where I want to change specific rows at given time points (“time column”). So far I have marked the time spots with an extra column ("Spike), where it gives a signal in the row in which the Signal has to be changed.

Thanks,
Tamas

[armingrudd]

Hi @Tamas,

I think the if() function in the Math Formula node can help you in this case:
if($Time$ == 1.791, $Signal$ - 0.1, $Signal$)

You can use any kind of calculation instead and you do not need the Spike column.

If you need to use more complex conditions/calculations and also include string columns in your conditions, you can use the Column Expressions node. Here you can find some good stuff about the node.

[Tamas]

Thank you, simple as it is that did the trick! Amazing

[ipazin]

Hi there @Tamas,

Table Editor can be helpful in case you need to first inspect table in order to define change.

Br,
Ivan