每当我需要绘制数据与时间的关系时，我会生成相应的 class TextTab extends JPanel
{
String[] textOptions = new String[]{"1 line of text","2 lines of text","3 lines of text","Chest Name","Script with Tail (1 Color)","Script with Tail (2 Color)"};
String[] numberOptions = new String[]{"1\"","2\"","3\"","4\"","6\"","8\"","10\""};
CustomJList<String> textList = new CustomJList<String>(textOptions);
CustomJList<String> numberList = new CustomJList<String>(numberOptions);
GridBagLayout ttGlay = new GridBagLayout();
GridBagConstraints gbc = new GridBagConstraints();
NimbusCellRenderer cr = new NimbusCellRenderer();
JPanel pnl = new JPanel(new GridBagLayout());
JScrollPane textNumOptionsPane = new JScrollPane(pnl);
public TextTab()
{
ttGlay.rowHeights = new int[]{0,137};
textList.setBorder(new TitledBorder(new SoftBevelBorder(SoftBevelBorder.LOWERED),"Standard Text"));
numberList.setBorder(new TitledBorder(new SoftBevelBorder(SoftBevelBorder.LOWERED),"Pre-Cut Numbers"));
textList.setOpaque(false);
textList.setCellRenderer(cr);
numberList.setOpaque(false);
numberList.setCellRenderer(cr);
textList.setBackground(Color.WHITE);
numberList.setBackground(Color.WHITE);
textList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
numberList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
setLayout(ttGlay);
gbc.weightx = 1;
gbc.weighty = 1;
gbc.gridx = 0;
gbc.gridy = 0;
gbc.anchor = gbc.NORTH;
gbc.fill = gbc.BOTH;
gbc.gridwidth = 1;
gbc.gridheight = 1;
gbc.insets = new Insets(10,10,0,0);
add(textList,gbc);
gbc.gridx = 1;
gbc.gridy = 0;
gbc.anchor = gbc.NORTH;
gbc.fill = gbc.BOTH;
gbc.gridwidth = 1;
gbc.gridheight = 1;
gbc.insets = new Insets(10,0,0,10);
add(numberList,gbc);
gbc.gridx = 0;
gbc.gridy = 1;
gbc.anchor = gbc.NORTH;
gbc.fill = gbc.BOTH;
gbc.gridwidth = 2;
gbc.gridheight = 1;
gbc.insets = new Insets(0,10,10,10);
add(textNumOptionsPane,gbc);
}
class CustomJList<E> extends JList<E>
{
public CustomJList(){super();}
public CustomJList(E[] listData){super(listData);}
public CustomJList(ListModel<E> dataModel){super(dataModel);}
public CustomJList(Vector<? extends E> listData){super(listData);}
@Override
public void paint(Graphics g)
{
Graphics2D g2 = (Graphics2D)g.create();
g2.setColor(getBackground());
if(!isOpaque())g2.fillRect(getInsets().left-4,getInsets().top-4,getWidth()-getInsets().left-getInsets().right+8,getHeight()-getInsets().top-getInsets().bottom+8);
super.paint(g);
}
}
class NimbusCellRenderer extends JLabel implements ListCellRenderer<Object>
{
public NimbusCellRenderer()
{
setOpaque(true);
}
public Component getListCellRendererComponent(JList<?> list,Object value,int index,boolean isSelected,boolean cellHasFocus)
{
setBorder(new EmptyBorder(0,5,0,0));
setText(value.toString());
Color background;
Color foreground;
if (isSelected&&list.hasFocus())
{
background = new Color(57,105,138);
foreground = Color.WHITE;
}
else
{
background = Color.WHITE;
foreground = Color.BLACK;
}
if(list.hasFocus()&&isSelected)
{
setBorder(new CompoundBorder(new CompoundBorder(new LineBorder(new Color(115,164,209),1),new LineBorder(new Color(72,120,155),1)),new EmptyBorder(0,3,0,0)));
}
setBackground(background);
setForeground(foreground);
return this;
}
}
}
数组，这样我就可以通过调用datenums来显示plot上的时间轴。
假设我需要所有的datenums，其间隔时间为datetick和h_1之间的1分钟。这是我如何生成我的datenums数组h_2：
vd我学习了这种阅读this answer的技术。
另一方面，每当我想生成一个datenum时，我就会使用h_1 = [01 00]; % 01:00 AM
h_2 = [17 00]; % 17:00 PM
HH_1 = h_1(1); % Hour digits of h_1
MM_1 = h_1(2); % Minute digits of h_1
HH_2 = h_2(1); % Hour digits of h_2
MM_2 = h_2(2); % Minute digits of h_2
% Vector of 01:00 - 17:30 with 1 minute increments (24 hours a day, 1440 minutes a day)
vd = HH_1/24+MM_1/1440:1/1440:HH_2/24+MM_2/1440;
函数：
datenum由于14:20在01:00到17:30之间，因此它的datenum也应该是！遗憾的是，这不符合预期，因为分配给d = datenum('14:20','HH:MM');
的号码与d中包含的值完全不同。我想我可能会遗漏一些东西，可能与设置参考日期或类似事件有关。
那么一致生成日期的合适方法是什么？
答案 0 :(得分：1)
原因是datenum函数为您提供从0000年1月0日起的天数。 所以在打电话时
d = datenum('14:20','HH:MM');
你得到一个大约735965的数字，而你的vd数组中的数字介于0和1之间。为了确定1月0日0000和今天之间的日期你可以写
d = datenum('14:20','HH:MM') - datenum('00:00','HH:MM');
然后你的代码看起来像
h_1 = [01 00]; % 01:00 AM
h_2 = [17 00]; % 17:00 PM
HH_1 = h_1(1); % Hour digits of h_1
MM_1 = h_1(2); % Minute digits of h_1
HH_2 = h_2(1); % Hour digits of h_2
MM_2 = h_2(2); % Minute digits of h_2
vd = HH_1/24 + MM_1/1440 : 1/1440 : HH_2/24+MM_2/1440;
d = datenum('14:20','HH:MM') - datenum('00:00','HH:MM');
display(d);
display(vd(801));
结果：
d = 0.5972
ans = 0.5972