Matlab 在对数基2比例上绘图

按照本文中的建议，我尝试绘制数据的log2值，并将水平轴和垂直轴上的刻度标签显示为2的幂。但是，我没有沿着两个轴获得所需的刻度标签。在两个轴上，我都希望记号标签显示为2的整数幂，即在x轴上：3和4，在y轴上：0，-1，-2，-3，-4和-5。这是我的密码：

x = [ 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 ]
Tcomm = [ 0.0357, 0.0515, 0.0745, 0.0956, 0.122, 0.1596, 0.2005, 0.2443, 0.2873, 0.3752, 0.4148, 0.5102, 0.5882 ]
plot(log2(x), log2(Tcomm), 'ko')
set(gca, 'XTickLabel',[])                      %# suppress current x-labels
xlim([log2(8),log2(16)])
xt = get(gca, 'XTick');
yl = get(gca, 'YLim');
str = cellstr( num2str(xt(:),'2^{%d}') );      %# format x-ticks as 2^{xx}
hTxt = text(xt, yl(ones(size(xt))), str, ...   %# create text at same locations
'Interpreter','tex', ...                   %# specify tex interpreter
'VerticalAlignment','top', ...             %# v-align to be underneath
'HorizontalAlignment','center');           %# h-aligh to be centered

xlabel('N');
ylim([log2(0.0357), log2(0.58825)])
set(gca, 'YTickLabel',[])
xt = get(gca, 'YTick');
yl = get(gca, 'XLim');
str = cellstr( num2str(xt(:),'2^{%d}') );      %# format x-ticks as 2^{xx}
hTxt = text(xt, yl(ones(size(xt))), str, ...   %# create text at same locations
'Interpreter','tex', ...                   %# specify tex interpreter
'VerticalAlignment','middle', ...             %# v-align to be underneath
'HorizontalAlignment','right');           %# h-aligh to be centered

ylabel('CommunicationTime');
title('(a)');

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对于Y轴部件，在text命令中，只需交换第一个值和第二个值：

xlabel('N');
ylim([log2(0.0357), log2(0.58825)])
set(gca, 'YTickLabel',[])
xt = get(gca, 'YTick');
yl = get(gca, 'XLim');
str = cellstr( num2str(xt(:),'2^{%d}') );      %# format x-ticks as 2^{xx}
hTxt = text( yl(ones(size(xt))),xt, str, ...   %# create text at same locations
'Interpreter','tex', ...                   %# specify tex interpreter
'VerticalAlignment','middle', ...             %# v-align to be underneath
'HorizontalAlignment','right');           %# h-aligh to be centered

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您的

x

数据中只有两个2的整数幂，8和16。您想要的刻度标签是什么

xt

包含带有

.5

的值，但您尝试打印带有

%d

的整数。右，在x轴上，仅3和4。在y轴上：0，-1，-2，-3，-4，-5