如何在 Octave 中编写滑块以进行交互式绘图? [英] How to code a slider in Octave to have interactive plot?
问题描述
我的目标是在外汇市场上绘制一个显示随机震荡指标的图表,为了验证哪个参数是设置它的最佳参数,我将使用滑块对其进行修改并在图表上显示更新的结果.
my target is to have a plot that shows Stochastic oscillator on forex market, and in order to validate which parameter is the best one to setup it, I would use a slider to modify it and show updated result on plot.
我有我的历史数据,对于一个已定义的货币对(比如说 AUDUSD),在加载它之后,我计算随机震荡指标:
I have my historical data, for a defined pair (let say AUDUSD) and after loading it, I calculate Stocastic oscillator:
function [stoch, fk, dk] = stochastic(n, k, d)
X=csvread("AUDUSD_2017.csv");
C=X(2:length(X),5);
L=X(2:length(X),4);
H=X(2:length(X),3);
O=X(2:length(X),2);
for m=n:length(C)-n
stoch(m)=((C(m)-min(L(m-n+1:m)))/(max(H(m-n+1:m))-min(L(m-n+1:m))))*100;
endfor
for m=n:length(C)-n
fk(m)=mean(stoch(m-d:m));
endfor
for m=n:length(C)-n
dk(m)=mean(fk(m-d:m));
endfor
endfunction
这是我绘制 stoch、fk 和 dk 时的图片:
This is a picture of what I have when I plot stoch, fk and dk:
我会在图中添加 3 个滑块,以便在一个范围内更改作为输入的参数,即有一个滑块将第一个参数n"更改为 3 到 50,k"更改为 2 到 20,和d"在 2 到 20 之间.
I would add 3 sliders to the figure in order to change, in a range, parameters as input, so i.e. to have a slider that changes first parameter "n" between 3 and 50, "k" between 2 and 20, and "d" between 2 and 20.
我会使用 octave 的 UI 包,有人可以告诉我在我使用滑块时更新绘图吗?
I would use UI package in octave, can someone address me to have a plot updated when I use sliders?
弗朗西斯科
推荐答案
Andy 在评论中指出,我链接的示例在开箱即用的 octave 上不起作用;这是因为 Octave 暂时不喜欢某些事情的嵌套函数,所以我在下面复制了一个八度版本".
Andy pointed out in the comments that the example I linked to doesn't work on octave out of the box; this is because Octave doesn't like nested functions for certain things for the time being, so I've reproduced an 'octave version' below.
%%%%%% In file myplot.m %%%%%
function myplot
%% Create initial figure and spiral plot
figure; axes ('position', [0.1, 0.3, 0.8, 0.6]);
global t; t = linspace (0, 8*pi, 100);
x = t .* cos(t); y = t .* sin(t);
plot (x, y); axis ([-100, 100, -100, 100]);
%% Add ui 'slider' element
hslider = uicontrol ( ...
'style', 'slider', ...
'Units', 'normalized', ...
'position', [0.1, 0.1, 0.8, 0.1], ...
'min', 1, ...
'max', 50, ...
'value', 10, ...
'callback', {@plotstuff} ...
);
end
%% Callback function called by slider event
%% Also in file myplot.m (i.e. a subfunction)
function plotstuff (h, event)
global t;
n = get (h, 'value');
x = n * t .* cos(t); y = n * t .* sin(t);
plot (x, y); axis ([-100, 100, -100, 100]);
end
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