Code for R. T. Scarl, K. L. Corbin, N. W. Vann, H. M. Smith, L. S. Satin, A. Sherman, C. S. Nunemaker. 2019. Intact pancreatic islets and dispersed beta-cells both generate intracellular calcium oscillations but differ in their responsiveness to glucose. Cell Calcium. 83:102081 PubMed

R code to generate Fig. 5 in the paper:
make-sigmoids