numdiff for Mac

numdiff is a command-line tool for comparing files, particularly well suited to text files that contain numbers. Ordinary text comparison tools tend to treat numbers as plain characters, flagging an entire line as different at the slightest discrepancy, whereas numdiff recognizes the actual numeric values and determines whether they are equal within an acceptable tolerance. This makes it much easier to compare files with floating-point numbers, such as experimental data, computation results, and log output. It is aimed at developers, researchers, and operations staff who need to verify numeric files, and it works smoothly when called from scripts. If you are often troubled by two columns of numbers that look the same yet are judged different, this tool can save you a good deal of manual checking time.