2017-02-03 44 views
-1

我正在使用MATLAB繪製圖表。任務是從FOR循環中的文件中讀取三個變量,讀取變量,繪製圖(1)(var1 vs var2),保存該圖,保存;情節圖(2)(var1 vs Var3)保存劇情保存它。打開另一個文件,讀取三個變量並在同一頁面上重複繪圖!現在在一個文件夾中有25個這樣的文件,它們將使用不同的顏色繪製,但在同一個繪圖上。就像在一個頁面上的所有var1和var2一樣。我的問題是給所有25個var1與var2的圖表傳說。我寫了一個示例代碼,但傳說沒有顯示。任何人都想幫助我解決問題!如何使用for循環和按住命令在matlab中使用圖例?

我的代碼如下:

clc 
clear 
close all 
colormap jet; 
%cmap=colormap; 
cmap = [jet(2); jet(2)]; 
curve_legends1 = cell(25, 1); 
curve_legends2 = cell(25, 1); 

files=cellstr(ls('*.txt')); 
for kk=1:length(files) 
    file1=files{kk}; 
    [pathstr,name,ext] = fileparts(file1); 


startRow = 2; 
formatSpec = '%15s%15s%15s%15s%15s%15s%15s%15s%15s%15s%15s%15s%15s%15s%s%[^\n\r]'; 
%% Open the text file. 
fileID = fopen(file1,'r'); 
dataArray = textscan(fileID, formatSpec, 'Delimiter', '', 'WhiteSpace', '', 'HeaderLines' ,startRow-1, 'ReturnOnError', false); 
%% Close the text file. 
fclose(fileID); 

raw = repmat({''},length(dataArray{1}),length(dataArray)-1); 
for col=1:length(dataArray)-1 
    raw(1:length(dataArray{col}),col) = dataArray{col}; 
end 
numericData = NaN(size(dataArray{1},1),size(dataArray,2)); 

for col=[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15] 
    % Converts strings in the input cell array to numbers. Replaced non-numeric 
    % strings with NaN. 
    rawData = dataArray{col}; 
    for row=1:size(rawData, 1); 
     % Create a regular expression to detect and remove non-numeric prefixes and 
     % suffixes. 
     regexstr = '(?<prefix>.*?)(?<numbers>([-]*(\d+[\,]*)+[\.]{0,1}\d*[eEdD]{0,1}[-+]*\d*[i]{0,1})|([-]*(\d+[\,]*)*[\.]{1,1}\d+[eEdD]{0,1}[-+]*\d*[i]{0,1}))(?<suffix>.*)'; 
     try 
      result = regexp(rawData{row}, regexstr, 'names'); 
      numbers = result.numbers; 

      % Detected commas in non-thousand locations. 
      invalidThousandsSeparator = false; 
      if any(numbers==','); 
       thousandsRegExp = '^\d+?(\,\d{3})*\.{0,1}\d*$'; 
       if isempty(regexp(thousandsRegExp, ',', 'once')); 
        numbers = NaN; 
        invalidThousandsSeparator = true; 
       end 
      end 
      % Convert numeric strings to numbers. 
      if ~invalidThousandsSeparator; 
       numbers = textscan(strrep(numbers, ',', ''), '%f'); 
       numericData(row, col) = numbers{1}; 
       raw{row, col} = numbers{1}; 
      end 
     catch me 
     end 
    end 
end 


%% Replace non-numeric cells with NaN 
R = cellfun(@(x) ~isnumeric(x) && ~islogical(x),raw); % Find non-numeric cells 
raw(R) = {NaN}; % Replace non-numeric cells 

data = cell2mat(raw); 

alt = data(:, 1); 
altkm = alt/1000 
h2o = data(:, 2); 
o2 = data(:, 3); 

figure(1) 
Plot_color=cmap(kk/1,:);   
plot(h2o,altkm,'Color', Plot_color); 
curve_legends1{kk+1} = ['LT = ' num2str(kk+1)]; 
ylim([0 110]); 
hold on 
s=[name]; 
ii=sscanf(s,'fig1_H2O_%f',[1,inf])' 
saveas(gca,sprintf('fig1_H2O_%d.pdf',(ii))) 

figure(2) 
Plot_color=cmap(kk/1,:);   
plot(o2,altkm,'Color', Plot_color); 
curve_legends2{kk+1} = ['LT = ' num2str(kk+1)]; 
ylim([0 110]); 
hold on 
s=[name]; 
ii=sscanf(s,'fig2_O2S_%f',[1,inf])' 
saveas(gca,sprintf('fig2_O2_%d.pdf',(ii))) 

end 

%% Clear temporary variables 
clearvars filename startRow formatSpec fileID dataArray ans; 

回答

0

您通過

curve_legends1{kk+1} = ['LT = ' num2str(kk+1)]; 

curve_legends2{kk+1} = ['LT = ' num2str(kk+1)]; 

分別建立自己的傳說字符串,但你永遠不應用它。乍一看,這似乎只缺少了對legend函數的調用。不知道哪一個去哪裏,但我猜legend(curve_legends1{kk+1})(第一次作業後)和legend(curve_legends2{kk+1})(第二次作業後)會做你可能需要的東西。順便說一下,不知道爲什麼你在這裏使用kk+1,因爲kk似乎是從1開始運行。所以你跳過了單元陣列的第一個元素。

+0

我會執行它會讓你知道! – MPJ

0

我已經在繪圖函數之後手動定義了圖例。 我已經實現了使用下面寫的命令。這幫助了我。感謝大家的建議。

legend('LT = 0.125','LT = 1.125',........ and so on); 
. 
. 
%adding the code before the loop ends (^_^) 

legend('show') 
end