I'm currently doing a CS masters and I did my undergrad in Physics. I'm really glad that I have the background in mathematics and stats that I have. In our ph

I'm currently doing a CS masters and I did my undergrad in Physics. I'm really glad that I have the background in mathematics and stats that I have. In our physics classes they really drilled into us that although our theory and homework often used exact numbers, no measurement meant anything without a measurement of the error. "A number without error is meaningless", they would say. One thing I never fully understood was how to calculate the propagation of error. There are many useful tricks for reducing the impact of error on your final calculation, and a few things you need to watch to make sure it doesn't increase.