如何在图形的图例中添加额外的信息? [英] How to add extra information to figure's legend?
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问题描述
我想向MATLAB中的图形添加额外的信息,如下所示:
I want to add extra Information to a figure in MATLAB, like this:
有可能吗? (我当然想让它更漂亮)
Is it possible? (Of course I want it to be more beautiful)
推荐答案
我整理了一些合理通用的东西,请参见下文.
I put together something reasonably generic, see below.
我将对此进行更多的概括,并将其发布到文件交换中,我认为它是一个相当不错的工具:)
I will generalize this a bit more and post it to the File Exchange, I think it's a fairly nice tool to have around :)
我打算
- 自动调整表格大小以适合其内容
- 使其适合于任意图例放置
- 用鼠标移动表和图例时将它们耦合在一起
- 将标题设为可选
- 支持各种类型的输入
但是现在:
% Example input
plot(1,1,'r.', 1.1,1.1', 'b.', 1.2,1.2, 'k.');
legendHandle = legend('plot 1', 'plot 2 with longer title', 'plot 3');
tableHead = {'\theta_0' '\phi' 'df/dx'};
tableContent = rand(3);
% Extract information
legendPosition = get(legendHandle, 'position');
children = get(legendHandle, 'children');
labels = children(strcmp(get(children, 'type'), 'text'));
% Basic error traps
if size(tableContent,1) ~= numel(labels)
error('LegendTable:dimension_mismatch',...
'Each legend entry must have a corresponding row in the table.')
end
if size(tableHead,2) ~= size(tableContent,2)
error('LegendTable:dimension_mismatch',...
'Table header dimensions are inconsistent with table data.');
end
% Convert header & content to cell-array when necessary
if isnumeric(tableContent)
tableContent = cellfun(@num2str, ...
num2cell(tableContent), 'UniformOutput', false);
end
if isnumeric(tableHead)
tableHead = cellfun(@num2str, ...
num2cell(tableHead), 'UniformOutput', false);
end
% Proper tick locations for the table
xticks = linspace(0, 1, numel(tableHead)+1);
yticks = linspace(0, 1, numel(labels)+2);
% Text positions are in the centers of the table cells
txt_xPositions = xticks(1:end-1) + (xticks(2)-xticks(1))/2;
txt_yPositions = fliplr(yticks(1:end-1) + (yticks(2)-yticks(1))/2);
% Derive correct table position
headerHeight = legendPosition(4)/numel(labels);
tablePosition = legendPosition + [0 -headerHeight 0 headerHeight];
% Shift position of original legend
set(legendHandle, 'position', legendPosition + [-tablePosition(3) -headerHeight 0 0])
% Create table
table = axes(...
'position', tablePosition,...
'xtick', xticks,...
'ytick', yticks,...
'xticklabel', [],...
'yticklabel', [],...
'gridlinestyle', '-',...
'box', 'on',...
'tag', 'LegendTable');
grid on
% Print table header & table entries
kk = 1;
tableTexts = zeros(numel(tableHead)+numel(tableContent),1);
for ii = 1:numel(txt_xPositions)
% Column header
tableTexts(kk) = text(txt_xPositions(ii), txt_yPositions(1), tableHead{ii},...
'parent', table,...
'HorizontalAlignment', 'center');
kk = kk + 1;
% Column content
for jj = 1:numel(txt_yPositions)-1
tableTexts(kk) = text(...
txt_xPositions(ii), txt_yPositions(jj+1), tableContent{jj,ii},...
'parent', table,...
'HorizontalAlignment', 'center');
kk = kk + 1;
end
end
结果:
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