Stop Matlab ignoring numbers

10 Mar 2022
1 Risposta
Risposta accettata
Aggiornato 10 Mar 2022
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Hello, my code is:
t=1;
h=6.626*10^-34;
e=2.718281828459;
l=1.757*10^-29;
m=1.652*10^-29;
n=0.8*m;
o=2*pi*395581*10^9;
p=2*pi*443941*10^9;
q=2*pi*48360*10^9;
w=1;
M=[0,(0.E-323+sqrt(-1)*0.132584E5),(0.E-323+sqrt(-1)*0.E-323),( ...
0.E-323+sqrt(-1)*(-0.132584E5)),0,0,(0.E-323+sqrt(-1)*0.E-323),0, ...
0;(0.E-323+sqrt(-1)*0.132584E5),(sqrt(-1)*(-1)).*((-1).*o+w),( ...
0.E-323+sqrt(-1)*0.E-323),0,(0.E-323+sqrt(-1)*(-0.132584E5)),0,0,( ...
0.E-323+sqrt(-1)*0.E-323),0;(0.E-323+sqrt(-1)*0.E-323),(0.E-323+ ...
sqrt(-1)*0.E-323),(sqrt(-1)*(-1)).*((-1).*p+w),0,0,(0.E-323+sqrt( ...
-1)*(-0.132584E5)).*e.^(sqrt(-1).*t.*((-1).*o+p+(-1).*q+w)),0,0,( ...
0.E-323+sqrt(-1)*0.E-323);(0.E-323+sqrt(-1)*(-0.132584E5)),0,0,( ...
sqrt(-1)*(-1)).*(o+(-1).*w),(0.E-323+sqrt(-1)*0.132584E5),( ...
0.E-323+sqrt(-1)*0.E-323),(0.E-323+sqrt(-1)*0.E-323),0,0;0,( ...
0.E-323+sqrt(-1)*(-0.132584E5)),0,(0.E-323+sqrt(-1)*0.132584E5),0, ...
(0.E-323+sqrt(-1)*0.E-323),0,(0.E-323+sqrt(-1)*0.E-323),0;0,0,( ...
0.E-323+sqrt(-1)*(-0.132584E5)).*e.^(sqrt(-1).*t.*(o+(-1).*p+q+( ...
-1).*w)),(0.E-323+sqrt(-1)*0.E-323),(0.E-323+sqrt(-1)*0.E-323),( ...
sqrt(-1)*(-1)).*((-1).*q+w),0,0,(0.E-323+sqrt(-1)*0.E-323);( ...
0.E-323+sqrt(-1)*0.E-323),0,0,(0.E-323+sqrt(-1)*0.E-323),0,0,( ...
sqrt(-1)*(-1)).*(p+(-1).*w),(0.E-323+sqrt(-1)*0.132584E5).*e.^( ...
sqrt(-1).*t.*(o+(-1).*p+q+(-1).*w)),(0.E-323+sqrt(-1)*0.E-323);0,( ...
0.E-323+sqrt(-1)*0.E-323),0,0,(0.E-323+sqrt(-1)*0.E-323),0,( ...
0.E-323+sqrt(-1)*0.132584E5).*e.^(sqrt(-1).*t.*((-1).*o+p+(-1).*q+ ...
w)),(sqrt(-1)*(-1)).*(q+(-1).*w),(0.E-323+sqrt(-1)*0.E-323);0,0,( ...
0.E-323+sqrt(-1)*0.E-323),0,0,(0.E-323+sqrt(-1)*0.E-323),(0.E-323+ ...
sqrt(-1)*0.E-323),(0.E-323+sqrt(-1)*0.E-323),0]
but my output is:
M =
1.0e+15 *
Columns 1 through 5
0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 - 0.0000i 0.0000 + 0.0000i
0.0000 + 0.0000i 0.0000 + 2.4855i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 - 0.0000i
0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 2.7894i 0.0000 + 0.0000i 0.0000 + 0.0000i
0.0000 - 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 - 2.4855i 0.0000 + 0.0000i
0.0000 + 0.0000i 0.0000 - 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i
0.0000 + 0.0000i 0.0000 + 0.0000i -0.0000 - 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i
0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i
0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i
0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i
Columns 6 through 9
0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i
0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i
0.0000 - 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i
0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i
0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i
0.0000 + 0.3039i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i
0.0000 + 0.0000i 0.0000 - 2.7894i 0.0000 + 0.0000i 0.0000 + 0.0000i
0.0000 + 0.0000i -0.0000 + 0.0000i 0.0000 - 0.3039i 0.0000 + 0.0000i
0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i
For example the second entry. It is not equal to 0. But in the output it is.How can I stop that ?

4 Commenti
Mostra 2 commenti meno recenti Nascondi 2 commenti meno recenti

KSSV
KSSV il 10 Mar 2022
They are not zeros....See that a number 1.0e+15 is multiplied to every element.
Stephen23
Stephen23 il 10 Mar 2022
Ran in:
Ran in:
"For example the second entry. It is not equal to 0. But in the output it is."
No, it is not equal to zero. Lets have a look at it:
t=1;
h=6.626*10^-34;
e=2.718281828459;
l=1.757*10^-29;
m=1.652*10^-29;
n=0.8*m;
o=2*pi*395581*10^9;
p=2*pi*443941*10^9;
q=2*pi*48360*10^9;
w=1;
M=[0,(0.E-323+sqrt(-1)*0.132584E5),(0.E-323+sqrt(-1)*0.E-323),( ...
0.E-323+sqrt(-1)*(-0.132584E5)),0,0,(0.E-323+sqrt(-1)*0.E-323),0, ...
0;(0.E-323+sqrt(-1)*0.132584E5),(sqrt(-1)*(-1)).*((-1).*o+w),( ...
0.E-323+sqrt(-1)*0.E-323),0,(0.E-323+sqrt(-1)*(-0.132584E5)),0,0,( ...
0.E-323+sqrt(-1)*0.E-323),0;(0.E-323+sqrt(-1)*0.E-323),(0.E-323+ ...
sqrt(-1)*0.E-323),(sqrt(-1)*(-1)).*((-1).*p+w),0,0,(0.E-323+sqrt( ...
-1)*(-0.132584E5)).*e.^(sqrt(-1).*t.*((-1).*o+p+(-1).*q+w)),0,0,( ...
0.E-323+sqrt(-1)*0.E-323);(0.E-323+sqrt(-1)*(-0.132584E5)),0,0,( ...
sqrt(-1)*(-1)).*(o+(-1).*w),(0.E-323+sqrt(-1)*0.132584E5),( ...
0.E-323+sqrt(-1)*0.E-323),(0.E-323+sqrt(-1)*0.E-323),0,0;0,( ...
0.E-323+sqrt(-1)*(-0.132584E5)),0,(0.E-323+sqrt(-1)*0.132584E5),0, ...
(0.E-323+sqrt(-1)*0.E-323),0,(0.E-323+sqrt(-1)*0.E-323),0;0,0,( ...
0.E-323+sqrt(-1)*(-0.132584E5)).*e.^(sqrt(-1).*t.*(o+(-1).*p+q+( ...
-1).*w)),(0.E-323+sqrt(-1)*0.E-323),(0.E-323+sqrt(-1)*0.E-323),( ...
sqrt(-1)*(-1)).*((-1).*q+w),0,0,(0.E-323+sqrt(-1)*0.E-323);( ...
0.E-323+sqrt(-1)*0.E-323),0,0,(0.E-323+sqrt(-1)*0.E-323),0,0,( ...
sqrt(-1)*(-1)).*(p+(-1).*w),(0.E-323+sqrt(-1)*0.132584E5).*e.^( ...
sqrt(-1).*t.*(o+(-1).*p+q+(-1).*w)),(0.E-323+sqrt(-1)*0.E-323);0,( ...
0.E-323+sqrt(-1)*0.E-323),0,0,(0.E-323+sqrt(-1)*0.E-323),0,( ...
0.E-323+sqrt(-1)*0.132584E5).*e.^(sqrt(-1).*t.*((-1).*o+p+(-1).*q+ ...
w)),(sqrt(-1)*(-1)).*(q+(-1).*w),(0.E-323+sqrt(-1)*0.E-323);0,0,( ...
0.E-323+sqrt(-1)*0.E-323),0,0,(0.E-323+sqrt(-1)*0.E-323),(0.E-323+ ...
sqrt(-1)*0.E-323),(0.E-323+sqrt(-1)*0.E-323),0];
It is unclear which element you mean by "second", so lets have at look at both of these:
format long G
M(1,2) % not zero
ans =
0 + 13258.4i
M(2,1) % not zero
ans =
0 + 13258.4i
Most likely you are making the mistake of confusing how data are displayed with what data are stored in memory.
Alland Kiepert
Alland Kiepert il 10 Mar 2022
So on the display there is just a 0 at certain entries because the exact terms would take too much space ?
James Tursa
James Tursa il 10 Mar 2022
Yes

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 Risposta accettata

Jan
Jan il 10 Mar 2022
Modificato: Jan il 10 Mar 2022

0 voti

format long g
This enables more visible digits. You get the complete control over the output format, if you use fprintf() instead:
for iR = 1:size(M, 1)
for iC = 1:size(M, 2)
fprintf('%18.16g+%18.16g, ', real(M(iR, iC)), imag(M(iR, iC)));
end
fprintf('\n');
end
% [EDITED, thanks Walter!]

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Richiesto:

Alland Kiepert
Alland Kiepert
il 10 Mar 2022

Modificato:

Jan
Jan
il 10 Mar 2022

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