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Description
I want change output format for numbers (stand alone floats, float matrix, BigFloats). I can do it in IPython by using %precision magic function. I didn't find any equivalent in Julia.
I know that I can use round but it actually returns different number. It's also cumbersome to convert arrays with combination map + round. One another problem: I didn't get how to change real or output precision of BigFloat: set_bigfloat_precision changes precision for all new BigFloats, copy and deepcopy don't help (they copy value irrespective of new default BigFloat precision), naive precision change via BigFloat.prec corrupts it.
I know, that I handle lot's of different topics in this question and I as a programmer understand that lot's of difficulties lays in output formats. But my friend, mathematician asked me: "Why can I just type %precision in my IPython notebook but not in Julia? Isn't output format change essential feature?".