R Under development (unstable) (2023-12-09 r85665 ucrt) -- "Unsuffered Consequences" Copyright (C) 2023 The R Foundation for Statistical Computing Platform: x86_64-w64-mingw32/x64 R is free software and comes with ABSOLUTELY NO WARRANTY. You are welcome to redistribute it under certain conditions. Type 'license()' or 'licence()' for distribution details. R is a collaborative project with many contributors. Type 'contributors()' for more information and 'citation()' on how to cite R or R packages in publications. Type 'demo()' for some demos, 'help()' for on-line help, or 'help.start()' for an HTML browser interface to help. Type 'q()' to quit R. > suppressPackageStartupMessages(library(float)) > > x = matrix(1:30, 10) > y = matrix(1:10, 10, 2) > z = crossprod(x) > w = z > w[1, 2] = -123456 > > xs = fl(x) > ys = fl(y) > zs = fl(z) > ws = fl(w) > > > test = isSymmetric(xs) > truth = isSymmetric(x) > stopifnot(identical(test, truth)) > > test = isSymmetric(ys) > truth = isSymmetric(y) > stopifnot(identical(test, truth)) > > test = isSymmetric(zs) > truth = isSymmetric(z) > stopifnot(identical(test, truth)) > > test = isSymmetric(ws) > truth = isSymmetric(w) > stopifnot(identical(test, truth)) > > proc.time() user system elapsed 0.32 0.01 0.32