R

Picture this: You’re running a mixed-effects model in R using the lmer function, excited to analyze your data, and then—bam!—you hit a wall. The error pops up: “Error in initializePtr() : function ‘cholmod_factor_ldetA’ not provided by package ‘Matrix’.” Frustrating, right? Don’t worry—you’re not alone, and as of March 15, 2025, this is a fixable problem. … Read more