I'm using the input command, with multiple inputs. I don't want the user to have to re-enter all the inputs if an error occurs.

Question

Andrew Jones 2019-7-11

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/471190-i-m-using-the-input-command-with-multiple-inputs-i-don-t-want-the-user-to-have-to-re-enter-all-the

编辑： Stephen23 2019-7-11

Here's my script. Thanks :D

%% User Inputs
% Numerous errors are accounted for.
point1=input('Enter the [x,y] coordinate of point 1: ');
if length(point1)~=2
    error('Inputs must be in the form [x,y]')
else 
    point2=input('Enter the [x,y] coordinate of point 2: ');
    if length(point2)~=2
        error('Inputs must be in the form [x,y]')
    elseif point1(1)==point2(1)
        error('Inputs must be non-vertical. (Cannot have the same x-value)')
    else
        point3=input('Enter the [x,y] coordinate of point 3: ');
        if length(point3)~=2
            error('Inputs must be in the form [x,y]')
        elseif point1(1)==point2(1) | point2(1)==point3(1) | point1(1)==point3(1)
            error('Inputs must be non-vertical. (Cannot have the same x-value)')
        else
        end
    end
end

3 个评论
显示 1更早的评论隐藏 1更早的评论

Andrew Jones 2019-7-11

im a bit confused regarding your explanation. care to elaborate a little deeper? I'm still a bit of a newbie. Thanks sir

Stephen23 2019-7-11

编辑：Stephen23 2019-7-11

Using input like this is a slow way to get input data, and IMO is not a particularly user-friendly way to write code. It also means that functions cannot be automatically tested and makes repeated calls completely impractical.

Consider specifying a config file and importing that, or simply writing a function with clearly specified and tested input/output arguments and leaving it up to the user to decide where their values come from.

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Raj 2019-7-11

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/471190-i-m-using-the-input-command-with-multiple-inputs-i-don-t-want-the-user-to-have-to-re-enter-all-the#answer_382790

编辑：Raj 2019-7-11

在 MATLAB Online 中打开

I would recommend not to use 'error' as program will stop and exit execution everytime an error occurs. Next time it will always start from beginning and user will have to enter all the values again. Instead, you can use a while loop and just display the message to user. This way program keeps on running till user gives correct value. Once the user gives correct value, move to next level. Something like this:

temp=1;
while temp==1
point1=input('Enter the [x,y] coordinate of point 1: ');
if length(point1)~=2
    disp('Inputs must be in the form [x,y]')
else
    break
end
end
%% Write code to input point 2 and 3 on similar lines.

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Andrew Jones 2019-7-11

you're awesome thank you!

请先登录，再进行评论。

I'm using the input command, with multiple inputs. I don't want the user to have to re-enter all the inputs if an error occurs.

3 个评论
显示 1更早的评论隐藏 1更早的评论

采纳的回答

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

更多回答（0 个）

另请参阅

类别

标签

产品

版本

Community Treasure Hunt

I'm using the input command, with multiple inputs. I don't want the user to have to re-enter all the inputs if an error occurs.

3 个评论 显示 1更早的评论隐藏 1更早的评论

采纳的回答

1 个评论 显示 -1更早的评论隐藏 -1更早的评论

更多回答（0 个）

另请参阅

类别

标签

产品

版本

Community Treasure Hunt

3 个评论
显示 1更早的评论隐藏 1更早的评论

1 个评论
显示 -1更早的评论隐藏 -1更早的评论