How to create pop out warning messages?

Question

Achchuthan Ganeshanathan 2013-3-6

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/66156-how-to-create-pop-out-warning-messages

I am trying to create a function that will display messages by comparing a certain input. How can I display messages at each stage, which is like a warning box. Please help

function [ output_args ] = Newfunction( velocity )
%UNTITLED Summary of this function goes here
%   Detailed explanation goes here
if (cond) 
     velocity >= 120;
   h=msgbox('Your speed is okay');
else if velocity >=100 & velocity <=100;
   h=msgboc('Warning:Approaching Stall');
      else
          h=msgbox('STALL');
end
end

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Answer 1

Walter Roberson 2013-3-6

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https://ww2.mathworks.cn/matlabcentral/answers/66156-how-to-create-pop-out-warning-messages#answer_77648

warndlg()

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Answer 2

Image Analyst 2013-3-6

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/66156-how-to-create-pop-out-warning-messages#answer_77654

在 MATLAB Online 中打开

warningMessage = sprintf('Warning: your velocity = %f\nYou may stall!', velocity);
uiwait(warndlg(warningMessage));

The uiwait is in there so your code does not go blasting merrily along. The uiwait() will cause the code to pause until the user clicks OK.

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Answer 3

Achchuthan Ganeshanathan 2013-3-6

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/66156-how-to-create-pop-out-warning-messages#answer_77663

在 MATLAB Online 中打开

function [ output_args ] = Newfunction( h )

%UNTITLED Summary of this function goes here

% Detailed explanation goes here

if 120<h<105

then warningMessage = sprintf('Warning: your velocity = %f\nYou may stall!', h);uiwait(warndlg('Approaching Stall'));

else if 105<h<100;

 then warningMessage = sprintf('Warning: your velocity = %f\nYou may stall!', h); uiwait(warndlg('Close to stall'));
    else if h<100
        then warningMessage = sprintf('Warning: your velocity = %f\nYou may stall!', h);uiwait(warndlg('STALL'));
        end
     end

end

It comes up as h is undefined as an error. h is a variable that changes and it is a user input, how can i insert a variable into it so i can get rid of the error. thankyou so much for the help so far guys

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Achchuthan Ganeshanathan 2013-3-8

在 MATLAB Online 中打开

function [ output_args ] = Newfunction( h )
%UNTITLED Summary of this function goes here
%   Detailed explanation goes here
if 105 < h && h < 120 
   warningMessage = sprintf('Warning: your velocity = %f\nYou may stall!', h);
uiwait(warndlg('Approaching Stall'));
elseif 100<h && h <105;
  warningMessage = sprintf('Warning: your velocity = %f\nYou may stall!', h);
uiwait(warndlg('Close to stall'));
    elseif h <100
         warningMessage = sprintf('Warning: your velocity = %f\nYou may stall!', h);
uiwait(warndlg('STALL'));
end

I have done what you advised me to do, I am still getting the error message. I apologise I am fairly new to all this. where do you think i seem to be going wrong

??? Input argument "h" is undefined.

Error in ==> Newfunction at 5 if 105 < h && h < 120

Walter Roberson 2013-3-8

在 MATLAB Online 中打开

How are you starting the code running? Are you going to Newfunction in the editor and pressing F5 or selecting run from the menus? If you are, then you cannot do that when you want to pass in parameters. You need to instead go to the command line and give a command such as

Newfunction(108)

Notice that is at the command line, not part of your code. It would instruct MATLAB to actually run the code, passing in the value 108 for h. Change the 108 to the value you want to give to h for your run.

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