using items multiple times across different blocks

[SamSWebb]

When using blocks of items with some items repeating in different blocks (never the same block) I get the following error:

'_Error in make_TIRT_data(data = FCdata, blocks = blocks, direction = "larger", : Item variables in different blocks needs to have different names. Use the 'names' argument in 'setblock' to equate item parameters across blocks.'

To reproduce the issue

data("triplets")

blocks <-
  set_block(c("i1", "i2", "i3"), traits = c("t1", "t2", "t3"),
          signs = c(1, 1, 1)) +
  set_block(c("i1", "i4", "i5"), traits = c("t1", "t4", "t4"),
          signs = c(1, 1, 1))

triplets_long <- make_TIRT_data(
  data = triplets, blocks = blocks, direction = "larger",
  format = "pairwise", family = "bernoulli", range = c(0, 1)
)

Please can you further explain how to use data with items that repeat in different blocks please

[paul-buerkner]

You should not use the first argument in set_block with the same name. I.e. don't use i1 in different blocks. Rather, use the names argument to equate them, that is you can use the item names in the "names" argument in different blocks. See example in the aother issue you posted in today.

[SamSWebb]

This does not work either sadly.

If i append a string to items, for instance instead of 'i2', I have 'i2extra' and the name of the item 'i2', this also causes the same error, as well as if I change item and name. Something else is going on and I cannot determine why it wont run with repeated items.

Can the name of the item nor the item include any string of other items in different blocks?

[paul-buerkner]

I need a minimal reproducible example for this to determine what is going on.

[SamSWebb]

sorry, it seems to have righted itself, running identical code.