Matlab使用字符串和浮点数生成二维图形

Question

Currently i have a function which plots the data in a graph as following:

function [ dim ] = showg( varargin )
%SHOWG Summary of this function goes here
%   Detailed explanation goes here

linespec = {'b', 'g', 'r', 'c', 'm', 'y', 'k'};
figure
hold on
filter_size = 1000;
a=1;
b = (1/filter_size)*ones(1,filter_size);

x=1;
y=0;
while x<=nargin

ch = cell2mat(varargin(x+1));
input = cell2mat(varargin(x));    
    %ch = CInt(varargin(x+1))
    %input = varargin(x)
    dim = size(input);

    for i = 2:(ch+1)
        z=i+y-1;
        color = mod(z,7);
        if color == 0
            color = 7;
        end
        out = (input(51:dim(1),1)-input(51,1))/1000;
        out2 = filter(b,a,input(51:dim(1),i));
        size(out)
        size(out2)
        plot(out',out2,linespec{color});
        legendInfo{z} = ['ch' num2str(z)];
    end
    y=(i-1);


    x=x+2;

end
legend(legendInfo);
xlabel('Time in s');
ylabel('Energy in J');

title('new plot')

   hold off; 
return 
end

However The lines currnetly generated give the name ch1,ch2 etc. I want to change that dynamically from the same file the data is coming from. A small snippet from the data is here which is a .csv important via matlab:

;Chipset;HDD;CPU1;MEM1;
43445653;0.01;0.01;0.01;0.00;
43445654;0.02;0.01;0.01;0.01;
43445655;0.03;0.02;0.02;0.01;
43445656;0.04;0.02;0.03;0.02;

Im importing this all with a Matrix however i can't figure out how to use the strings "Chipset, HDD" etc for the names instead of ch1, ch2.

Answer 1

Ok, just import your data in a cellarray with text for field, as in the below image,

and you will end up with:

>> file

file = 

    ''            'Chipset'    'HDD'     'CPU1'    'MEM1'
    '43445653'    '0.01'       '0.01'    '0.01'    '0.00'
    '43445654'    '0.02'       '0.01'    '0.01'    '0.01'
    '43445655'    '0.03'       '0.02'    '0.02'    '0.01'
    '43445656'    '0.04'       '0.02'    '0.03'    '0.02'

then extract your labels for the legend:

>> legends = file(1,2:end)

legends = 

    'Chipset'    'HDD'    'CPU1'    'MEM1'

Then you can get your data by,

>> data = file(2:end, :)

data = 

    '43445653'    '0.01'    '0.01'    '0.01'    '0.00'
    '43445654'    '0.02'    '0.01'    '0.01'    '0.01'
    '43445655'    '0.03'    '0.02'    '0.02'    '0.01'
    '43445656'    '0.04'    '0.02'    '0.03'    '0.02'

which can be turned into a matrix of doubles by,

>> data = cell2mat(cellfun(@str2num,data,'un',0))

data =

    43445653    0,01    0,01    0,01    0
    43445654    0,02    0,01    0,01    0,01
    43445655    0,03    0,02    0,02    0,01
    43445656    0,04    0,02    0,03    0,02

well, you can work from here...

OK, I've imported my data and called showg(file) ,

your varargin will be a 1x1cell , so just do newfile = varargin{1} .

Example of your function

function [ dim ] = showg( varargin )
%SHOWG Summary of this function goes here
%   Detailed explanation goes here

%% MYCODE
newfile = varargin{1};
legends = newfile(1,2:end);
data = newfile(2:end, :);
data = cell2mat(cellfun(@str2num,data,'un',0));

%% go from here...