一、怎麼利用散點繪製出趨勢線 （matlab） 在線等 急急急~~~
a=[你的數據]；
plot(a)
二、如何用matlab如何試用plot命令畫趨勢
x=linspace(-1,1,1000) y=sin(1./x); plot(x,y) linspace函數可以生成等間距的向量。它與冒號運算符類似,但它可以直接控制點的數量。 y=linspace(a,b) 生成一箇行向量,該 向量將a與 b之 間平分爲 100個 點,包含端點a和 b。
三、想問一下怎樣用MATLAB畫10000條股票的價格走勢圖
xlsread 可以導入數據 比如data=xlsread('dd.xls','Sheet1','B1:G2')就是讀取dd.xls文件裏面b1到g2之間的數據！
四、matlab製作圖表趨勢
趨勢線，其實質就是對散點的數據擬合。
Matlab裏有這個工具箱，輸入cftool命令即可調出工具箱。
先導入數據，然後再Fitting裏面選擇合適的擬合方程以得到理想的擬合曲線，
即你所要的趨勢線。工具箱會給出擬合方程和誤差範圍。
補充:
直接在Matlab命令提示符處輸入cftool然後回車就會出來工具箱了
五、matlab畫走勢圖任意設置座標問題
x1 = [1,2,3,4,5,6,7,8,9,10];
y1 = [0.4739,0.01813,0.00828,0.00516,0.00438,0.01108,0.00312,0.00234,0.00219,0.00141];
x2 = [1,2,3,4,5,6,7,8,9,10];
y2 = [0.01312,0.01824,0.01019,0.01284,0.01941,0.01467,0.01184,0.01123,0.01392,0.01184];
x3 = [1,2,3,4,5,6,7,8,9,10];
y3 = [0.00234,0.00212,0.00201,0.00226,0.00282,0.00225,0.00252,0.00223,0.00215,0.00252];
plot(x1,y1,'-o',x2,y2,'-p',x3,y3,'-h');grid on;
set(gca,'XTickLabel',[0 0.001 0.01 0.1 1]);
legend('M','C','T');
xlabel('Threshold(%)');
ylabel('Time(seconds)');
六、matlab如何畫N個數值的曲線走勢圖
例如
A = [1 2 3 4]; %中括號裏是你的400個數據，用空格號隔開；
plot（A）;% 作圖
