I have a Component that generates results on a 2D grid. I would like to be able to change the size of that grid as an input to the component. When I do so, I get errors such as:
ValueError: could not broadcast input array from shape (42025) into shape (40401)
I have params and unknowns like:
self.add_param('plot_res', val=201, pass_by_obj=True, description='Data output resolution')
self.add_output('out_grid', shape=201*201, description='output grid')
When I change plot_res, I get the error I pasted above.
Thanks in advance for your help.
You are not allowed to change the size of a variable after setup() has been called. Instead, I suggest that you make the desired size an argument to your __init__ method.
Related
When I run a Xcos model containing a scifunc_block_m block like shown below
I get an error message relating to data dimensions inconsistency:
"Data dimensions are inconsistent:"
" Variable size=[1,1]"
"Block output size=[100,1]."
But when I double click in the block in order to see what can I change to make the dimensions correct I get a message in the console saying
Undefined variable: scifunc_block_m
What bugs me is that scifunc_block_m is not the name of any variable, but rather the name of the block itself like can be seen in the official docs.
Of course I double checked that nowhere in my function phase_shifter neither anywhere else I have any variable named like that.
I tried with Scilab 6.1.1 and 6.1.0 believing that it might be a bug from apparently not.
In your phase_shifter.sce file generating the input variable,
the signalIn variable does not comply with the From Workspace block requirements, whose documentation says that the input variable
must be a structure with time and values fields
.time must be a column vector, and in your case
.values must also be a column
So,
t = (0:1/fs:Npp/fs - 1/fs); // time vector
signalIn = A*%e^(%i*w*t);
should be replaced with
t = (0:1/fs:Npp/fs - 1/fs)'; // time column vector
signalIn = struct("time",t, "values",A*%e^(%i*w*t));
This fixes the inconsistent dimensions message.
In addition, i am not able to reproduce your issue about Undefined variable: scifunc_block_m. The parameters interface opens as expected.
You may get this kind of messages if you try to run some xcos parts out of xcos, without beforehand loading xcos-related libraries.
Then, we get an unclear "Output should be of complex type." message on the From workspace block.
By the way, you try to plot some complex values. Please have a look to the MATMAGPHI block before entering MUX: https://help.scilab.org/docs/6.1.1/en_US/MATMAGPHI.html
I'm switching over to using the Auto-IVC component as opposed to the IndepVar component. I'd like to be able to get a list of the promoted output names of the Auto-IVC component, so I can then use them to go and pull the appropriate value out of a configuration file and set the values that way. This will get rid of some boilerplate.
p.model._auto_ivc.list_outputs()
returns an empty list. It seems that p.model__dict__ has this information encoded in it, but I don't know exactly what is going on there so I am wondering if there is an easier way to do it.
To avoid confusion from future readers, I assume you meant that you wanted the promoted input names for the variables connected to the auto_ivc outputs.
We don't have a built-in function to do this, but you could do it with a bit of code like this:
seen = set()
for n in p.model._inputs:
src = p.model.get_source(n)
if src.startswith('_auto_ivc.') and src not in seen:
print(src, p.model._var_allprocs_abs2prom['input'][n])
seen.add(src)
assuming 'p' is the name of your Problem instance.
The code above just prints each auto_ivc output name followed by the promoted input it's connected to.
Here's an example of the output when run on one of our simple test cases:
_auto_ivc.v0 par.x
I'm starting out with Qt Creator and I'm working on mapping some key value pairs (AWG wire gauge sizes as keys and the diameter as value). In using QMap to create the map, I'm getting compile errors of 'awg_map does not name a type'. Can anyone point me in the right direction here?
I've tried adding values two ways that are supposed to work, according to the instructions found at http://doc.qt.io/qt-5/qmap.html. Both ways generate the error noted above.
#include <QMap>
QMap<QString, float> awg_map;
awg_map["20"] = 0.812;
awg_map.insert("21", 0.723);
Looks like G.M. was right with this comment
Statements such as awg_map["20"] = 0.812; and awg_map.insert("21",
0.723); aren't valid at global scope and should be in a function body (for example).
I dropped it all into the MainWindow::MainWindow and it compiled fine. Thanks for that one GM!
I have a GUI application whose main part is a QPlainTextEdit. It is used to display a log of the application, and as such the associated text grows line by line ad infinitum.
As the application is intended to run very long, I need to limit the memory that will be allocated for this log. Therefore I want to have some maxNumLines or maxNumCharacters parameter that will make sure the history will be truncated when reached, i.e. the head lines will be removed as new lines are appended (a.k.a. log rotation).
To achieve this I found the functions
// get the associated text
QString toPlainText () const
// set the associated text
void setPlainText ( const QString & text )
Therefore something like this untested code would probably do the trick:
QString &tmp = pte.toPlainText();
while (tmp.size() > maxNumCharacters) {
// remove lines from the head of the string until the desired size is reached
// removes nothing if "\n" could not be found
tmp.remove(0, tmp.indexOf("\n")+1);
}
pte.setPlainText( tmp );
Is this the way to go to remove the first line(s) from the QPlainTextEdit? Are there probably other Qt Text GUI elements that would better fit to this task (set a maximum number of lines and truncate at the head of the list), e.g. somehow display a QStringList in which I could store the lines (s.t. I could easily erase(0))?
Or does the QPlainTextEdit eventually implement such upper bound for the size of the associated QString after all?
Apparantly the property maximumBlockCount is exactly what I need:
If you want to limit the total number of paragraphs in a QPlainTextEdit, as it is for example useful in a log viewer, then you can use the maximumBlockCount property. The combination of setMaximumBlockCount() and appendPlainText() turns QPlainTextEdit into an efficient viewer for log text.
For reference:
http://doc.qt.io/qt-5/qplaintextedit.html#maximumBlockCount-prop
I had exactly the same problem a months back, and I ended up using a QListView. Although using the model/view/delegate architecture is a bit more fiddly, it scales much better in the long run. For example once the basic architecture is in place, adding a filter that displays only error or warning entries becomes trivial, or creating a delegate so that the background of error entries are painted red is also straightforward.
this is my syntax editor program i want to show keyword,classes,function and ...with Separate color i set the color in config file(with Qsetting)
for example this in my config file :
FunctionColor=blue
an in my cod i read the the configfile:
QString FunctionColor=settings.value("FunctionColor").toString();
how i can set the color in this instruction:
functionFormat.setForeground(Qt::FunctionColor);
compiler gives error? what i must be doing????
It would be great if you provide clear snippet codes instead of the example instructions above. However, based on my guess, if you check Qt documentation,
setForeground
is taking QBrush type of parameter. That means, to get what you want probably, you need to add some logic to convert between the string value to the QBrush value, for example:
if (FunctionColor == "blue")
{
functionFormat.setForeground(Qt::blue);
}
See if this could fix the problem.