r - save output in data.frame for if-else statement -

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I try to create a function (which will later be used to work with shiny R) At the moment I fail to store results from my function in the data frame. So far I have created the following code: 

  f_expccm

I hope to receive an output data with the following entries: 

  [1] -500 [1] 855 [1] 738.40 9 1 [6] 637.7169 [1] 550.7555 [1] 475.6525

But I am only able to get it if I Add print function (which does not save results from my knowledge ...):

Any help will be greatly appreciated !!! Best regards,

Is this the behavior you are looking for? 

  F_expccm

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