How to delete rows in matlab

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norscrown
norscrown 2015-2-5
评论： norscrown 2015-2-5
So guys i need your help this is my code:
a=3;
lamda=1.54;
in=-3:3;
%calculate z
[h,k,l]=meshgrid(in);
d = sqrt((a.^2)/(h.^2 + k.^2 + l.^2));
z = (lamda./(2*d));
%sort absolute values ascending, which allows to use unique
ac=sort(abs([h(:) k(:) l(:)]),2);
%use unique to identify duplicates
[f,g,h]=unique(ac,'rows');
%count
cnt=histc(h,1:max(h));
disp([h(g),k(g), l(g),z(g),cnt])
i just want to delete or terminate rows containing z>=90, i can't used break because it only works in for loop or while loop,
so what other command may i use? thankas.

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回答（1 个）

Orion
Orion 2015-2-5
try something like this
% create a matrix with all vectors
M = [h(g),k(g), l(g),z(g),cnt];
% define the threshold for z
threshold = 0.90;
% delete all lines with z>0.90
M(M(:,4)>threshold,:) = [];
  2 个评论
norscrown
norscrown 2015-2-5
i'm sorry but it doesn't display the output i want
norscrown
norscrown 2015-2-5
if true
% code this is the output i want
h k l z cnt
0 0 1 1 6
0 0 2 4 6
0 0 3 9 6
0 1 1 2 12
0 1 2 5 24
0 1 3 10 24
0 2 2 8 12
0 2 3 13 24
1 1 1 3 8
1 1 2 6 24
1 1 3 11 24
1 2 2 9 24
1 2 3 14 48
2 2 2 12 8

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