请问MATLAB中画bar时怎么让x变成对数坐标# Computation - 科学计算
g*s
1 楼
bar(x,y)
set(gca,'XSCALE','log')
不行,总出来 Warning:Negative data ignored.
set(gca,'XSCALE','log')
不行,总出来 Warning:Negative data ignored.
r*y
2 楼
This is because your x points contain negative values ba, so
log scale ignored them.
【在 g******s 的大作中提到】
: bar(x,y)
: set(gca,'XSCALE','log')
: 不行,总出来 Warning:Negative data ignored.
log scale ignored them.
【在 g******s 的大作中提到】
: bar(x,y)
: set(gca,'XSCALE','log')
: 不行,总出来 Warning:Negative data ignored.
g*s
3 楼
no negative values at all in my x points.
my x points are,
x=[1e4 1e5 1e6];
【在 r****y 的大作中提到】
: This is because your x points contain negative values ba, so
: log scale ignored them.
my x points are,
x=[1e4 1e5 1e6];
【在 r****y 的大作中提到】
: This is because your x points contain negative values ba, so
: log scale ignored them.
f*r
4 楼
the reason is a bar has some width
if you look at the linear bar graph, the left most bar
actually has some part in negative region, that's the reason
why you got such an error message.
One not elegant way to get aroud is like this
set the width of bar to be very small:
bar(x,y,0.01)
set(gca,'XScale','log')
【在 g******s 的大作中提到】
: no negative values at all in my x points.
: my x points are,
: x=[1e4 1e5 1e6];
if you look at the linear bar graph, the left most bar
actually has some part in negative region, that's the reason
why you got such an error message.
One not elegant way to get aroud is like this
set the width of bar to be very small:
bar(x,y,0.01)
set(gca,'XScale','log')
【在 g******s 的大作中提到】
: no negative values at all in my x points.
: my x points are,
: x=[1e4 1e5 1e6];
g*s
5 楼
Thanks a lot. However in this way the width of bars would not be the same.
I use x=[4 5 6] to replace x=[1e4 1e5 1e6]. Afterwards, I change them back
using set(gca,'XTickLabels',['10^4';'10^5';'10^6']). But 上标符号 ^ doesn't
work. Could you anyone tell me how to do with it?
Thanks!
【在 f********r 的大作中提到】
: the reason is a bar has some width
: if you look at the linear bar graph, the left most bar
: actually has some part in negative region, that's the reason
: why you got such an error message.
: One not elegant way to get aroud is like this
: set the width of bar to be very small:
: bar(x,y,0.01)
: set(gca,'XScale','log')
I use x=[4 5 6] to replace x=[1e4 1e5 1e6]. Afterwards, I change them back
using set(gca,'XTickLabels',['10^4';'10^5';'10^6']). But 上标符号 ^ doesn't
work. Could you anyone tell me how to do with it?
Thanks!
【在 f********r 的大作中提到】
: the reason is a bar has some width
: if you look at the linear bar graph, the left most bar
: actually has some part in negative region, that's the reason
: why you got such an error message.
: One not elegant way to get aroud is like this
: set the width of bar to be very small:
: bar(x,y,0.01)
: set(gca,'XScale','log')
f*r
6 楼
since matlab currently doesn't support using Tex command in
tick labels, I dout there is any direct way to do it.
But if the only thing you want is a printed figure, maybe the
following package will help
http://www.mathworks.de/matlabcentral/fileexchange/loadFile.do?objectId=4638&objectType=file
or visit it here
http://www.uni-kassel.de/fb16/rat/matlab/laprint/
You can print the figure in eps format or Tex format
hope this will help
tick labels, I dout there is any direct way to do it.
But if the only thing you want is a printed figure, maybe the
following package will help
http://www.mathworks.de/matlabcentral/fileexchange/loadFile.do?objectId=4638&objectType=file
or visit it here
http://www.uni-kassel.de/fb16/rat/matlab/laprint/
You can print the figure in eps format or Tex format
hope this will help
f*n
7 楼
semilogx(x,y) plots log(x) vs y.
【在 g******s 的大作中提到】
: bar(x,y)
: set(gca,'XSCALE','log')
: 不行,总出来 Warning:Negative data ignored.
【在 g******s 的大作中提到】
: bar(x,y)
: set(gca,'XSCALE','log')
: 不行,总出来 Warning:Negative data ignored.
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