We are working on a problem that is analogous to the species richness problem, but in the domain of cognitive psychology. We will be glad to tell you more if you wish. However, we are writting because when using the SpadeR package, we get confidence intervals for richness estimates that include the point estimator less frequently than the expected. We are running simulations with artificial data (similar to incidence matrices) and we often get that the estimator is captured by the 95% confidence intervals only 70% of the time or less.

Any chances that you could provide some guidance?

Much thanks,

]]>I’m a PhD student from Barcelona and I’m trying to use the iNEXT function with “incidence_raw” option. My data is a matrix of 0 and 1, as I saw in ciliates and the structure of the matrix seems to be exactly the same too. However once i run the function an error appears that I dont understand

the error si the following:

Error in if (A == 1) { : missing value where TRUE/FALSE needed

In addition: Warning message:

In rbinom(length(pi.star) * B, t, pi.star) : NAs produced

But I can’t find A==1 in the function to know what it means.

Thanks in advance

Aitziber ]]>

61313 0

51188 0

I know that D must equal to zero for this data, but I am curious if there is a limit for the sample size to be analysed. Is it possible, run the same analysis using a sub-samples 10 or 100 fold smaller?

613 0

511 0

I am using SpadeR for extracting a stratigraphic profile of Horn Index for a paleoecological study from abundance data. I’ve attempted this by extracting the diagonal of the similarity matrix using q=1 beginning with second row and first column. However I’m finding inconsistencies with this method between my excel calculations and with the Vegan package. I know that Vegan cannot do real Horn, this is why I’ve tried SpadeR. I find inconsistencies between Vegan Morisita-Horn and SpadeR Morisita-Horn.

Is there an easier approach to extracting a Horn Index from SpadeR that outputs a “stratigraphic” vector?

Thank you for your time!

]]>I successfully used SpadeR online before, but then I the error occured whenever i entry data. it mentioned that “Error: an error has occurred. Check your logs or contact the app author for clarification”

What can I do to solve it? Thank you for your attention. ]]>

I need to calculate the exponential of Shannon entropy for foraminefera assemblages.

When the file input is (these are abundances)

0

109

0

0

0

0

0

0

4

0

0

0

28

0

0

0

2

0

0

0

it works. However, when the file input is (abundaces again)

3

278

0

0

0

0

0

0

47

0

0

0

38

0

0

0

3

0

0

0

an error occured. What is the problem? Thanks, best regards ]]>

I am using SpadeR for multiple community similarity measures. I am wondering what will be the best way to apply a paried t-test on the percentage similarity results in order to check if they are significantly different.

Thanks in advance!