Symbolic printing without extensive decimals

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Ramses Young
Ramses Young 2021-4-11
评论： Star Strider 2021-4-11
syms x
f=x*1231871.1561876*5618965/3156651894-561894+4849159*15844/5189;
l=vpa(x*1231871.1561876*5618965/3156651894-561894+4849159*15844/5189);
fprintf('%s\n',f)
fprintf('%s\n',l)
(1351321833700369665875*x)/616259847708475392 + 7647426328677875/536870912
2192.7792938728320167173931401797*x + 14244441.555212950333952903747559
I am trying to get my problem to print more efficiently, I have tried the vpa tool, and it works nicely, but I have no customization (as far as im aware) as to how to control the number of decimal places on the polynomial that is being printed using these commands while having a symbolic function/polynomial.
How can I tidy up this so that it prints in an easier to read format, with, for example, 5 decimal places rather than the amount it has?

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采纳的回答

Star Strider
Star Strider 2021-4-11
Set digits to whatever value you want:
syms x
f=x*1231871.1561876*5618965/3156651894-561894+4849159*15844/5189;
digits(5)
l=vpa(x*1231871.1561876*5618965/3156651894-561894+4849159*15844/5189);
fprintf('%s\n',f)
fprintf('%s\n',l)
producing:
(1351321833700369665875*x)/616259847708475392 + 7647426328677875/536870912
2192.8*x + 1.4244e+7
.

更多回答（1 个）

Martinez Tutt
Martinez Tutt 2021-4-11
Try using (line spacing)

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