Variation of income by family month by month

[#1]

Dear,

I need to find out:

      If the analyzed family had the income altered from one month to the other,

Was varied, and varied positively,

Was varied, and negatively varied.

It did not work: above function, nor previus.

Thank you!

[sunny_talwar]

May be you need Before here?

=((sum(vlr_renda)/Before(sum(vlr_renda)))-1)*100

[sunny_talwar]

Read about Before and After here:

Missing Manual - Before() and After()

[#4]

Thanks for your response, but it's not work because I need consider the date before (not the column before).

[sunny_talwar]

What is the output that you are expecting to see?