Bat algorithm for variable selection in multivariate classification modeling using linear discriminant analysis

•BA-LDA, alternative to perform variable selection in multivariate classification.•BA-LDA simulates the echolocation behaviour of bats when moving in search of prey.•BA-LDA reduces the number of non-informative variables and multicollinearity in LDA.•BA-LDA outperformed GA-LDA and SPA-LDA in classification of sera from unaffected and affected women with ovarian cancer.•Successful classifications of coffees and edible oils via NIR and UV–vis spectrometry.