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QtCharts : How create bar chart with error bars?

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  • VRoninV Offline
    VRoninV Offline
    VRonin
    wrote on last edited by
    #2

    do you have a visual example? You could just add 2 more series with the lower and upper confidence level on the same x and y axis...

    "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
    ~Napoleon Bonaparte

    On a crusade to banish setIndexWidget() from the holy land of Qt

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    • N Offline
      N Offline
      NuttinGo
      wrote on last edited by NuttinGo
      #3

      I have the firt chart for the moment and i want the second graph
      0_1479148435151_WI_Island_acs28_acs26.png 0_1479148536030_Error_bars_with_multiple_attributes__groups__example1__vertical_bars_.png

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      • VRoninV Offline
        VRoninV Offline
        VRonin
        wrote on last edited by
        #4

        Image upload doesn't work, see https://forum.qt.io/topic/62615/how-to-insert-image-on-this-forum

        "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
        ~Napoleon Bonaparte

        On a crusade to banish setIndexWidget() from the holy land of Qt

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        • N Offline
          N Offline
          NuttinGo
          wrote on last edited by
          #5

          I want a chart like that.
          http://images.google.fr/imgres?imgurl=http%3A%2F%2Fwww.ats.ucla.edu%2Fstat%2Fstata%2Ffaq%2Fbarcap1.gif&imgrefurl=http%3A%2F%2Fwww.ats.ucla.edu%2Fstat%2Fstata%2Ffaq%2Fbarcap.htm&h=278&w=413&tbnid=FWpc-v4UiWo_7M%3A&vet=1&docid=sdXt_RvY3x-Z7M&ei=5gMqWIjxGdayjwOdoL_wCQ&tbm=isch&iact=rc&uact=3&dur=1506&page=0&start=0&ndsp=26&ved=0ahUKEwiI_IrQ8ajQAhVW2WMKHR3QD54QMwgeKAEwAQ&bih=723&biw=1518

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          • VRoninV Offline
            VRoninV Offline
            VRonin
            wrote on last edited by
            #6

            Probably you can just add a Box Whiskers series with just the whiskers http://doc.qt.io/qt-5/qtcharts-boxplotchart-example.html

            "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
            ~Napoleon Bonaparte

            On a crusade to banish setIndexWidget() from the holy land of Qt

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            • N Offline
              N Offline
              NuttinGo
              wrote on last edited by
              #7

              Good idea but I need a grouped bar chart for a scientific article.

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              • N Offline
                N Offline
                NuttinGo
                wrote on last edited by
                #8

                No idea ?

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                • VRoninV Offline
                  VRoninV Offline
                  VRonin
                  wrote on last edited by
                  #9

                  reimplementing the paint of the chart is of course a solution but painful

                  "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
                  ~Napoleon Bonaparte

                  On a crusade to banish setIndexWidget() from the holy land of Qt

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                  • N Offline
                    N Offline
                    NuttinGo
                    wrote on last edited by
                    #10

                    UP!
                    I don't have solution.

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                    • N Offline
                      N Offline
                      NuttinGo
                      wrote on last edited by
                      #11

                      UP! Please :)

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                      • M Offline
                        M Offline
                        MElectronVolt
                        wrote on last edited by
                        #12

                        I want to veer off-topic slightly, but I think it's a shame that it's currently impossible to create scientific graphs using Qt. Error bars are essential for plotting functions or displaying data points.

                        I hope that the Qt team will eventually enable scientists and data scientists to fully utilize this framework.

                        Thank you to everyone at Qt 👍👏. I'm seriously considering purchasing a commercial license just to support your future efforts.

                        JoeCFDJ 1 Reply Last reply
                        1
                        • M MElectronVolt

                          I want to veer off-topic slightly, but I think it's a shame that it's currently impossible to create scientific graphs using Qt. Error bars are essential for plotting functions or displaying data points.

                          I hope that the Qt team will eventually enable scientists and data scientists to fully utilize this framework.

                          Thank you to everyone at Qt 👍👏. I'm seriously considering purchasing a commercial license just to support your future efforts.

                          JoeCFDJ Offline
                          JoeCFDJ Offline
                          JoeCFD
                          wrote on last edited by JoeCFD
                          #13

                          @MElectronVolt VTK may have some options for scientific graphs. VTK was started for rendering of scientific data. Qt was not. Good news is you can use mix Qt with VTK.

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