拥有以下3D阵列（9,9,9）：
np.arange（729）.reshape（（9,9,9））
max = 0 'set "inital" max
For Each rcell in rrng.cells 'loop through values
if rcell.value > max then 'if a value is larger than the old max,
max = rcell.value ' store it as the new max!
Next rcell
如何重塑它看起来像这个2D数组（27,27）：
[[[ 0 1 2 3 4 5 6 7 8]
[ 9 10 11 12 13 14 15 16 17]
[ 18 19 20 21 22 23 24 25 26]
[ 27 28 29 30 31 32 33 34 35]
[ 36 37 38 39 40 41 42 43 44]
[ 45 46 47 48 49 50 51 52 53]
[ 54 55 56 57 58 59 60 61 62]
[ 63 64 65 66 67 68 69 70 71]
[ 72 73 74 75 76 77 78 79 80]]
...
[[648 649 650 651 652 653 654 655 656]
[657 658 659 660 661 662 663 664 665]
[666 667 668 669 670 671 672 673 674]
[675 676 677 678 679 680 681 682 683]
[684 685 686 687 688 689 690 691 692]
[693 694 695 696 697 698 699 700 701]
[702 703 704 705 706 707 708 709 710]
[711 712 713 714 715 716 717 718 719]
[720 721 722 723 724 725 726 727 728]]]
答案 0 :(得分：2)
您可以先将阵列重塑为4d阵列，交换第二和第三轴，然后将其重新整形为27 X 27：
public class CustomExpandableListAdapter extends BaseExpandableListAdapter {
private Context context;
private List<String> expandableListTitle;
private HashMap<String, List<String>> expandableListDetail;
public static ArrayList<Integer> selected = new ArrayList<>();
private Realm realm = Realm.getDefaultInstance();
public CustomExpandableListAdapter(Context context, List<String> expandableListTitle,
HashMap<String, List<String>> expandableListDetail) {
this.context = context;
this.expandableListTitle = expandableListTitle;
this.expandableListDetail = expandableListDetail;
}
@Override
public Object getChild(int listPosition, int expandedListPosition) {
return this.expandableListDetail.get(this.expandableListTitle.get(listPosition))
.get(expandedListPosition);
}
@Override
public long getChildId(int listPosition, int expandedListPosition) {
return expandedListPosition;
}
@Override
public View getChildView(int listPosition, final int expandedListPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
final String expandedListText = (String) getChild(listPosition, expandedListPosition);
if (convertView == null) {
LayoutInflater layoutInflater = (LayoutInflater) this.context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = layoutInflater.inflate(R.layout.list_item, null);
}
TextView expandedListTextView = (TextView) convertView
.findViewById(R.id.expandedListItem);
expandedListTextView.setText(expandedListText);
return convertView;
}
@Override
public int getChildrenCount(int listPosition) {
return this.expandableListDetail.get(this.expandableListTitle.get(listPosition))
.size();
}
@Override
public Object getGroup(int listPosition) {
return this.expandableListTitle.get(listPosition);
}
@Override
public int getGroupCount() {
return this.expandableListTitle.size();
}
@Override
public long getGroupId(int listPosition) {
return listPosition;
}
@Override
public View getGroupView(final int listPosition, boolean isExpanded, View convertView, ViewGroup parent) {
SharedPreferences pref = context.getSharedPreferences("MAIN_PREF", MODE_PRIVATE);
final SharedPreferences.Editor editor = pref.edit();
final String listTitle = (String) getGroup(listPosition);
final boolean[] sel = {RealmController.getGroup(listTitle, realm).isSelect()};
if (convertView == null) {
LayoutInflater layoutInflater = (LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
// convertView = layoutInflater.inflate(R.layout.list_group, null);
convertView = layoutInflater.inflate(R.layout.holder_layout, null);
}
// TextView listTitleTextView = (TextView) convertView
// .findViewById(R.id.listTitle);
TextView listTitleTextView = (TextView) convertView.findViewById(R.id.showText);
final CheckBox checkBox = (CheckBox) convertView.findViewById(R.id.checkBoxHolder);
// if (pref.getInt(listTitle, 0) == 1) {
// checkBox.setSelected(true);
// } else {
// checkBox.setSelected(false);
// }
checkBox.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (checkBox.isSelected()) {
checkBox.setSelected(false);
RealmResults<ObjectsInGroupRealm> objectsInGroupRealms = RealmController.getObjects(realm, listTitle);
int position = -1;
for (ObjectDefExtends objectDefExtends : Singleton.getInstance().getListaODE()) {
for (ObjectsInGroupRealm o : objectsInGroupRealms) {
if (o.getName().equals(objectDefExtends.name)) {
position = Singleton.getInstance().getListaODE().indexOf(objectDefExtends);
Singleton.getInstance().getListaODE().get(position).visible = false;
editor.putInt(Singleton.getInstance().getListaODE().get(position).id.toString(), 0);
editor.apply();
// RealmController.updateGroup(o.getName(),false,realm);
}
}
}
// editor.putInt(listTitle, 0);
// editor.apply();
selected.remove(Integer.valueOf(listPosition));
} else {
checkBox.setSelected(true);
selected.add(listPosition);
RealmResults<ObjectsInGroupRealm> objectsInGroupRealms = RealmController.getObjects(realm, listTitle);
int position = -1;
for (ObjectDefExtends objectDefExtends : Singleton.getInstance().getListaODE()) {
for (ObjectsInGroupRealm o : objectsInGroupRealms) {
if (o.getName().equals(objectDefExtends.name)) {
position = Singleton.getInstance().getListaODE().indexOf(objectDefExtends);
Singleton.getInstance().getListaODE().get(position).visible = false;
editor.putInt(Singleton.getInstance().getListaODE().get(position).id.toString(), 1);
editor.apply();
RealmController.updateGroup(o.getName(),true,realm);
sel[0] =true;
checkBox.setSelected(true);
// notifyDataSetChanged();
}
}
}
// editor.putInt(listTitle, 1);
// editor.apply();
}
// notifyDataSetChanged();
}
});
listTitleTextView.setTypeface(null, Typeface.BOLD);
listTitleTextView.setText(listTitle);
checkBox.setSelected(sel[0]);
return convertView;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public boolean isChildSelectable(int listPosition, int expandedListPosition) {
return true;
}
}
答案 1 :(得分：1)
import numpy as np
x = np.arange(729).reshape(9, 9, 9)
y = x.transpose(1, 0, 2).reshape(27, 27)
y[y[:,2].argsort()]
<强>说明
我使用numpy.transpose来置换每个轴的步幅和形状信息。
>>> x.strides
(324L, 36L, 4L)
>>> x.transpose(1, 0, 2).strides
(36L, 324L, 4L)
此answer中的详细信息。
然后我按预期使用了numpy.reshape 2D中的(9L, 9L, 9L)
>>> x.reshape(27, 27)
(27L, 27L)
当然，transpose中的函数组合（如reshape和numpy）非常常见。它允许您在单行中进行矩阵变换：
x.transpose(1, 0, 2).reshape(27, 27)
修改
正如@PaulPanzer指出的那样，数组未被排序。
到sort array column by column，可以使用：
y[y[:,2].argsort()]
但也许这不是最简单的答案。
答案 2 :(得分：0)
如果您可以在列表中移动数据，则可以使用：
np.hstack([x for x in np.arange(729).reshape((9,9,9))])